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Finding the Fourth Proportional to 71,318.52, 106,969.56 and 18,732.18

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Solution

The fourth proportional to 71,318.52, 106,969.56 and 18,732.18 is: 28,096.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,318.52 : 106,969.56 = 18,732.18 : x
  2. Step 2: Convert to fraction form
    71,318.52/106,969.56 = 18,732.18/x
  3. Step 3: Cross multiply
    71,318.52x = 106,969.56 × 18,732.18
  4. Step 4: Simplify right side
    71,318.52x = 2,003,773,052.44
  5. Step 5: Solve for x
    x = 2,003,773,052.44/71,318.52
  6. Step 6: Final answer
    x = 28,096.11

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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.