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Finding the Fourth Proportional to 87,168.92, 130,640.97 and 42,179.70

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Solution

The fourth proportional to 87,168.92, 130,640.97 and 42,179.70 is: 63,215.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,168.92 : 130,640.97 = 42,179.70 : x
  2. Step 2: Convert to fraction form
    87,168.92/130,640.97 = 42,179.70/x
  3. Step 3: Cross multiply
    87,168.92x = 130,640.97 × 42,179.70
  4. Step 4: Simplify right side
    87,168.92x = 5,510,397,570.39
  5. Step 5: Solve for x
    x = 5,510,397,570.39/87,168.92
  6. Step 6: Final answer
    x = 63,215.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.