Brad is 3/4 the age of Manel. Manuel is twice as old as Benigno. Jose is 3 years and 2 months younger than Brad. Douglas is 1 1/2 times the age of Jose and a month older than Manuel. Benigno is 19 years and 4 months old. How old are the others?

You already know that Begigno is 232 months old and Manuel is twice that (464 months).

Douglas is 465 months old.
Brad is (3/4) the age of Manuel or 348 months. You only have two unknowns left and plenty of information to figure out their ages