Posted by Josh on Tuesday, July 24, 2012 at 12:08am.
1/9  (k+3)/(72K) = 1/(9k)  (k1)/(8k)

math  Reiny, Tuesday, July 24, 2012 at 12:42am
1/9  (k+3)/(72K) = 1/(9k)  (k1)/(8k)
multiply each term by 72k
8k  (k+3) = 8  9(k1)
8k  k  3 = 8  9k + 9
16k = 20
k = 20/16 = 5/4 or 1.25