Question 1012290
Call Jen's, Kathy's, and Lou's salary, J, K, and L.
Then we have
J/K = 4/3  or  J = (4/3)K
We also have
L = K + 4000
Then if J + K + L = 134,000
we can substitute in for J and L and get
(4/3)K + K + (K + 4000) = 134000
Putting the K's together, we have 
(10/3)K + 4000 = 134000
(10/3)K = 130000
Now multiply by 3/10 and get
K = 39000
Thus
L = 43000
and
J = (4/3)(39000) = 52000
Checking...
39000+43000+52000=134000