Finding the Third Proportional to 128,776.50 and 171,942.75
Calculator
Solution
The third proportional to 128,776.50 and 171,942.75 is: 229,578.45
Step by Step Solution
- Step 1: Write the proportion equation
128,776.50 : 171,942.75 = 171,942.75 : x - Step 2: Convert to fraction form
128,776.50/171,942.75 = 171,942.75/x - Step 3: Cross multiply
128,776.50x = 171,942.75 × 171,942.75 - Step 4: Simplify right side
128,776.50x = 29,564,309,277.56 - Step 5: Solve for x
x = 29,564,309,277.56/128,776.50 - Step 6: Final answer
x = 229,578.45
Related Problems
Find third proportional to 64,388.25 and 85,971.38
Half scale
Find third proportional to 257,553 and 343,885.50
Double scale
Find third proportional to 128,779 and 171,945
Similar ratio
Find third proportional to 193,164.75 and 257,914.13
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.