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Finding the Fourth Proportional to 71,424.40, 98,565.90 and 39,593.80

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Solution

The fourth proportional to 71,424.40, 98,565.90 and 39,593.80 is: 54,639.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,424.40 : 98,565.90 = 39,593.80 : x
  2. Step 2: Convert to fraction form
    71,424.40/98,565.90 = 39,593.80/x
  3. Step 3: Cross multiply
    71,424.40x = 98,565.90 × 39,593.80
  4. Step 4: Simplify right side
    71,424.40x = 3,902,598,531.42
  5. Step 5: Solve for x
    x = 3,902,598,531.42/71,424.40
  6. Step 6: Final answer
    x = 54,639.57

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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.