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Finding the Fourth Proportional to 125,149.46, 187,791.62 and 90,958.95

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Solution

The fourth proportional to 125,149.46, 187,791.62 and 90,958.95 is: 136,487.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,149.46 : 187,791.62 = 90,958.95 : x
  2. Step 2: Convert to fraction form
    125,149.46/187,791.62 = 90,958.95/x
  3. Step 3: Cross multiply
    125,149.46x = 187,791.62 × 90,958.95
  4. Step 4: Simplify right side
    125,149.46x = 17,081,328,119.20
  5. Step 5: Solve for x
    x = 17,081,328,119.20/125,149.46
  6. Step 6: Final answer
    x = 136,487.44

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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.