Script Resize selection Proportionately based on top object dimensions

Figured out a way to loop through a selection and resize everything proportionately to the top object. Is there a way to do this more elegantly? Transformation.DOCUMENTORIGIN seems to be the key, as all objects will be resized relatively, otherwise they are resized based on their own anchors. I reset the view at the end or otherwise it's way off.

    function ccCalcPerc(from, to) {
        //currently only illustrator
        //Times 72 if you're in inches
        return (to * 72) / from * 100
    }
    function aiObjBounds(obj) {
        //Get Geometric Bounds 
        /* Left, Top, Right and Bottom 
        + - 1 - +
        |       |
        0       2
        |       |
        + - 3 - +
        */
        var bounds = obj.typename === "Artboard" ? obj.artboardRect : obj.geometricBounds,
            left = bounds[0];
        top = bounds[1];
        right = bounds[2];
        bottom = bounds[3];
        width = right - left;
        height = top - bottom;

        props = {
            bounds: [left, top, right, bottom],
            left: left,
            top: top,
            right: right,
            bottom: bottom,
            width: Math.abs(width),
            height: Math.abs(height),
            obj: obj
        };

        return props;
    }
var aD = app.activeDocument;
d = aiObjBounds(aD.selection[0]);
b = 5;
aSel = aD.selection;
        var wPerc = ccCalcPerc(d.width, sizeIN);
        var hPerc = ccCalcPerc(d.height, sizeIN);//Add conditional to use height Percentage instead
for (k in aSel) {
//To scale proportionately, the percentage is calculated once and used for both.
    aSel[k].resize(wPerc, wPerc, true, true, true, true, 100, Transformation.DOCUMENTORIGIN)
}
aD.selection = null;
aSel[0].selected = true;
app.executeMenuCommand("Fit Artboard to selected Art")
app.executeMenuCommand("fitin");
app.executeMenuCommand("zoomout");