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Finding the Fourth Proportional to 71,773.38, 107,676.18 and 21,857.42

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Solution

The fourth proportional to 71,773.38, 107,676.18 and 21,857.42 is: 32,791.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,773.38 : 107,676.18 = 21,857.42 : x
  2. Step 2: Convert to fraction form
    71,773.38/107,676.18 = 21,857.42/x
  3. Step 3: Cross multiply
    71,773.38x = 107,676.18 × 21,857.42
  4. Step 4: Simplify right side
    71,773.38x = 2,353,522,951.87
  5. Step 5: Solve for x
    x = 2,353,522,951.87/71,773.38
  6. Step 6: Final answer
    x = 32,791.03

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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.