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Finding the Fourth Proportional to 71,957.62, 99,301.89 and 40,127.86

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Solution

The fourth proportional to 71,957.62, 99,301.89 and 40,127.86 is: 55,376.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,957.62 : 99,301.89 = 40,127.86 : x
  2. Step 2: Convert to fraction form
    71,957.62/99,301.89 = 40,127.86/x
  3. Step 3: Cross multiply
    71,957.62x = 99,301.89 × 40,127.86
  4. Step 4: Simplify right side
    71,957.62x = 3,984,772,339.66
  5. Step 5: Solve for x
    x = 3,984,772,339.66/71,957.62
  6. Step 6: Final answer
    x = 55,376.66

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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.