It's a question of interpretation. You were struck by this, I was struck by something else. If the G2 cubit be 528mm, as I suggested might be possible from the exterior dimensions, then 103.68 inches might be 5 cubits. The width, at 41.97 inches, would be just over 2 cubits. The average is 528.5mm.
As you know, Petrie averages his measurements. For instance, he provides a mean passage width of 41.59 inches which if 2 cubits would represent a length of 528mm.
Having said this, Petrie provides earlier a mean passage width of 41.29, which is 2 cubits at G1.
As DUNE says, we're hit by coincidence!
Edited 1 time(s). Last edit at 07-Jan-19 13:34 by gjb.