Outline:

The Destruction of Sodom

City not destroyed for ten.
Save 8 chosen to be saved.
4 refused to go, even though chosen by an angel to be saved
1 becomes salt
Mountains see harsh, Go to Zoar, but it is now unacceptable, flee to mountains

Parable of Ten Virgins

50 % were wise
Other 50% were shut out, Never knew you
D&C 45 says they are burned! This is like the Lord not only closes the door but comes out with a flame thrower. Harsh!
That ties directly to 50% saved from the destruction of Sodom and Gomorrah