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Finding the Fourth Proportional to 71,310.55, 106,957.59 and 18,724.15

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Solution

The fourth proportional to 71,310.55, 106,957.59 and 18,724.15 is: 28,084.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,310.55 : 106,957.59 = 18,724.15 : x
  2. Step 2: Convert to fraction form
    71,310.55/106,957.59 = 18,724.15/x
  3. Step 3: Cross multiply
    71,310.55x = 106,957.59 × 18,724.15
  4. Step 4: Simplify right side
    71,310.55x = 2,002,689,958.80
  5. Step 5: Solve for x
    x = 2,002,689,958.80/71,310.55
  6. Step 6: Final answer
    x = 28,084.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.