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Finding the Fourth Proportional to 99,120.92, 136,753.54 and 63,331.88

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Solution

The fourth proportional to 99,120.92, 136,753.54 and 63,331.88 is: 87,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,120.92 : 136,753.54 = 63,331.88 : x
  2. Step 2: Convert to fraction form
    99,120.92/136,753.54 = 63,331.88/x
  3. Step 3: Cross multiply
    99,120.92x = 136,753.54 × 63,331.88
  4. Step 4: Simplify right side
    99,120.92x = 8,660,858,784.86
  5. Step 5: Solve for x
    x = 8,660,858,784.86/99,120.92
  6. Step 6: Final answer
    x = 87,376.70

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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.