To find the missing number, we can set up the equation based on the information given:
\[ 100,000,000 + 8,000,000 + x = 108,070,000 \]
First, we can combine the known numbers:
\[ 100,000,000 + 8,000,000 = 108,000,000 \]
Now, we can substitute this value back into the equation:
\[ 108,000,000 + x = 108,070,000 \]
Next, we subtract 108,000,000 from both sides:
\[ x = 108,070,000 - 108,000,000 \]
Calculating the right side gives:
\[ x = 70,000 \]
Therefore, the missing number is 70,000.