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Finding the Fourth Proportional to 79,884.90, 119,704.17 and 39,311.85

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Solution

The fourth proportional to 79,884.90, 119,704.17 and 39,311.85 is: 58,907.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,884.90 : 119,704.17 = 39,311.85 : x
  2. Step 2: Convert to fraction form
    79,884.90/119,704.17 = 39,311.85/x
  3. Step 3: Cross multiply
    79,884.90x = 119,704.17 × 39,311.85
  4. Step 4: Simplify right side
    79,884.90x = 4,705,792,375.41
  5. Step 5: Solve for x
    x = 4,705,792,375.41/79,884.90
  6. Step 6: Final answer
    x = 58,907.16

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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.