Finding the Fourth Proportional to 103,691.12, 143,107.60 and 58,377.92
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Solution
The fourth proportional to 103,691.12, 143,107.60 and 58,377.92 is: 80,569.33
Step by Step Solution
- Step 1: Write the proportion equation
103,691.12 : 143,107.60 = 58,377.92 : x - Step 2: Convert to fraction form
103,691.12/143,107.60 = 58,377.92/x - Step 3: Cross multiply
103,691.12x = 143,107.60 × 58,377.92 - Step 4: Simplify right side
103,691.12x = 8,354,324,024.19 - Step 5: Solve for x
x = 8,354,324,024.19/103,691.12 - Step 6: Final answer
x = 80,569.33
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.