48??? Let's see.

There are 48 hours in 2 days.
If you are 48 you are 2 years away from 50.
Somewhere around the world the #48 bus will take you downtown.
Somewhere around the world there has to be a 48th Street or a 48th Avenue.
There are 576 inches in 48 feet.
There are 144 feet in 48 yards.