ENO's are right at 10' long, and the common length used when adding a ridgeline to one is ~100", give or take a couple of inches on each measurement.
That's very close to yours, when you compare the ratio of fabric length to ridgeline length.
“I think that when the lies are all told and forgot the truth will be there yet. It dont move about from place to place and it dont change from time to time. You cant corrupt it any more than you can salt salt.” - Cormac McCarthy