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Finding the Fourth Proportional to 125,198.40, 187,748.16 and 45,213.12

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Solution

The fourth proportional to 125,198.40, 187,748.16 and 45,213.12 is: 67,801.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,198.40 : 187,748.16 = 45,213.12 : x
  2. Step 2: Convert to fraction form
    125,198.40/187,748.16 = 45,213.12/x
  3. Step 3: Cross multiply
    125,198.40x = 187,748.16 × 45,213.12
  4. Step 4: Simplify right side
    125,198.40x = 8,488,680,087.86
  5. Step 5: Solve for x
    x = 8,488,680,087.86/125,198.40
  6. Step 6: Final answer
    x = 67,801.83

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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.