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Finding the Fourth Proportional to 71,791.65, 107,690.11 and 36,690.30

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Solution

The fourth proportional to 71,791.65, 107,690.11 and 36,690.30 is: 55,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,791.65 : 107,690.11 = 36,690.30 : x
  2. Step 2: Convert to fraction form
    71,791.65/107,690.11 = 36,690.30/x
  3. Step 3: Cross multiply
    71,791.65x = 107,690.11 × 36,690.30
  4. Step 4: Simplify right side
    71,791.65x = 3,951,182,351.21
  5. Step 5: Solve for x
    x = 3,951,182,351.21/71,791.65
  6. Step 6: Final answer
    x = 55,036.80

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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.