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Finding the Fourth Proportional to 87,400.80, 120,582 and 51,572.88

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Solution

The fourth proportional to 87,400.80, 120,582 and 51,572.88 is: 71,152.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,400.80 : 120,582 = 51,572.88 : x
  2. Step 2: Convert to fraction form
    87,400.80/120,582 = 51,572.88/x
  3. Step 3: Cross multiply
    87,400.80x = 120,582 × 51,572.88
  4. Step 4: Simplify right side
    87,400.80x = 6,218,761,016.16
  5. Step 5: Solve for x
    x = 6,218,761,016.16/87,400.80
  6. Step 6: Final answer
    x = 71,152.22

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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.