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Finding the Fourth Proportional to 87,140.92, 130,728.40 and 27,972.04

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Solution

The fourth proportional to 87,140.92, 130,728.40 and 27,972.04 is: 41,963.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,140.92 : 130,728.40 = 27,972.04 : x
  2. Step 2: Convert to fraction form
    87,140.92/130,728.40 = 27,972.04/x
  3. Step 3: Cross multiply
    87,140.92x = 130,728.40 × 27,972.04
  4. Step 4: Simplify right side
    87,140.92x = 3,656,740,033.94
  5. Step 5: Solve for x
    x = 3,656,740,033.94/87,140.92
  6. Step 6: Final answer
    x = 41,963.52

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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.