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Finding the Fourth Proportional to 71,958.65, 99,304.20 and 40,124.12

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Solution

The fourth proportional to 71,958.65, 99,304.20 and 40,124.12 is: 55,371.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,958.65 : 99,304.20 = 40,124.12 : x
  2. Step 2: Convert to fraction form
    71,958.65/99,304.20 = 40,124.12/x
  3. Step 3: Cross multiply
    71,958.65x = 99,304.20 × 40,124.12
  4. Step 4: Simplify right side
    71,958.65x = 3,984,493,140.78
  5. Step 5: Solve for x
    x = 3,984,493,140.78/71,958.65
  6. Step 6: Final answer
    x = 55,371.99

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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.