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Finding the Fourth Proportional to 71,379.38, 107,069.81 and 28,704.56

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Solution

The fourth proportional to 71,379.38, 107,069.81 and 28,704.56 is: 43,057.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.38 : 107,069.81 = 28,704.56 : x
  2. Step 2: Convert to fraction form
    71,379.38/107,069.81 = 28,704.56/x
  3. Step 3: Cross multiply
    71,379.38x = 107,069.81 × 28,704.56
  4. Step 4: Simplify right side
    71,379.38x = 3,073,391,321.75
  5. Step 5: Solve for x
    x = 3,073,391,321.75/71,379.38
  6. Step 6: Final answer
    x = 43,057.13

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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.