Question 112370
Let the first number be x-2
The mid number ia x
Third Number is x+2
Adding the first plus twice the second plus four times the third we get:
....x-2
...2x
...4x+8
--------
   7x+6
--------
7x+6=174
7x=174-6=168
x=168/7=24
So the numbers are ....22, 24 and 26
Verification

.....22
+    48
+   104
-------
    174
--------  OK.