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Finding the Fourth Proportional to 87,781.92, 120,895.92 and 75,841.44

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Solution

The fourth proportional to 87,781.92, 120,895.92 and 75,841.44 is: 104,451.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,781.92 : 120,895.92 = 75,841.44 : x
  2. Step 2: Convert to fraction form
    87,781.92/120,895.92 = 75,841.44/x
  3. Step 3: Cross multiply
    87,781.92x = 120,895.92 × 75,841.44
  4. Step 4: Simplify right side
    87,781.92x = 9,168,920,662.92
  5. Step 5: Solve for x
    x = 9,168,920,662.92/87,781.92
  6. Step 6: Final answer
    x = 104,451.13

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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.