Question 18669
Well, you might think that you need 3 variables, but you actually don't!
You only need 1 variable. 
N, N+1, N+2
If you don't believe me, try any number.
Let's say 5
We know that the next two numbers will be 6 and 7
5, 5+1, 5+2
5, 6, 7
Now that we got that taken care of, you need to make it a mathematical equation.
{{{N+N+1+N+2=114}}}
{{{3N+3=114}}}
{{{3N=111}}}
{{{N=37}}}
That means the three numbers are 37, 38, 39.
Hope this helps!