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Finding the Fourth Proportional to 87,001.92, 120,079.92 and 56,792.16

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Solution

The fourth proportional to 87,001.92, 120,079.92 and 56,792.16 is: 78,384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,001.92 : 120,079.92 = 56,792.16 : x
  2. Step 2: Convert to fraction form
    87,001.92/120,079.92 = 56,792.16/x
  3. Step 3: Cross multiply
    87,001.92x = 120,079.92 × 56,792.16
  4. Step 4: Simplify right side
    87,001.92x = 6,819,598,029.43
  5. Step 5: Solve for x
    x = 6,819,598,029.43/87,001.92
  6. Step 6: Final answer
    x = 78,384.45

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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.