113.5 is very close, if my new tactic is correct.

Here's my new tactic - ask poser where the camera is.

poser.Scene().CurrentCamera().WorldDisplacement()

With my main camera dolly 0, 0, 0, and all rotations 0, 0, 0, it reports (in Poser Native Units)

(0.0, 0.0, 1.100000023841858)

Using the official Poser inch ratio (103.2) we get a z coordinate of 113.52000 (there are more decimal places, but I don't think we care)

Thanks bagginsbill - that's a lot easier than my method !   :)     Good to see that your figure's very close to mine

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The 3Dcheapskate (also available in DAZ and HiveWire3D flavours) occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.