Finding the Fourth Proportional to 80,862.60, 121,400.70 and 69,091.75
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Solution
The fourth proportional to 80,862.60, 121,400.70 and 69,091.75 is: 103,728.88
Step by Step Solution
- Step 1: Write the proportion equation
80,862.60 : 121,400.70 = 69,091.75 : x - Step 2: Convert to fraction form
80,862.60/121,400.70 = 69,091.75/x - Step 3: Cross multiply
80,862.60x = 121,400.70 × 69,091.75 - Step 4: Simplify right side
80,862.60x = 8,387,786,814.23 - Step 5: Solve for x
x = 8,387,786,814.23/80,862.60 - Step 6: Final answer
x = 103,728.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.