Finding the Third Proportional to 78,639.75 and 121,992.75
Calculator
Solution
The third proportional to 78,639.75 and 121,992.75 is: 189,245.66
Step by Step Solution
- Step 1: Write the proportion equation
78,639.75 : 121,992.75 = 121,992.75 : x - Step 2: Convert to fraction form
78,639.75/121,992.75 = 121,992.75/x - Step 3: Cross multiply
78,639.75x = 121,992.75 × 121,992.75 - Step 4: Simplify right side
78,639.75x = 14,882,231,052.56 - Step 5: Solve for x
x = 14,882,231,052.56/78,639.75 - Step 6: Final answer
x = 189,245.66
Related Problems
Find third proportional to 39,319.88 and 60,996.38
Half scale
Find third proportional to 157,279.50 and 243,985.50
Double scale
Find third proportional to 78,642 and 121,996
Similar ratio
Find third proportional to 117,959.63 and 182,989.13
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.