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Finding the Fourth Proportional to 71,381.20, 98,508 and 39,553.60

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Solution

The fourth proportional to 71,381.20, 98,508 and 39,553.60 is: 54,585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,381.20 : 98,508 = 39,553.60 : x
  2. Step 2: Convert to fraction form
    71,381.20/98,508 = 39,553.60/x
  3. Step 3: Cross multiply
    71,381.20x = 98,508 × 39,553.60
  4. Step 4: Simplify right side
    71,381.20x = 3,896,346,028.80
  5. Step 5: Solve for x
    x = 3,896,346,028.80/71,381.20
  6. Step 6: Final answer
    x = 54,585.05

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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.