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Finding the Fourth Proportional to 72,752.26, 100,397.10 and 40,921.20

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Solution

The fourth proportional to 72,752.26, 100,397.10 and 40,921.20 is: 56,470.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,752.26 : 100,397.10 = 40,921.20 : x
  2. Step 2: Convert to fraction form
    72,752.26/100,397.10 = 40,921.20/x
  3. Step 3: Cross multiply
    72,752.26x = 100,397.10 × 40,921.20
  4. Step 4: Simplify right side
    72,752.26x = 4,108,369,306.53
  5. Step 5: Solve for x
    x = 4,108,369,306.53/72,752.26
  6. Step 6: Final answer
    x = 56,470.68

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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.