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Finding the Fourth Proportional to 125,251.30, 187,548.90 and 91,790.20

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Solution

The fourth proportional to 125,251.30, 187,548.90 and 91,790.20 is: 137,444.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,251.30 : 187,548.90 = 91,790.20 : x
  2. Step 2: Convert to fraction form
    125,251.30/187,548.90 = 91,790.20/x
  3. Step 3: Cross multiply
    125,251.30x = 187,548.90 × 91,790.20
  4. Step 4: Simplify right side
    125,251.30x = 17,215,151,040.78
  5. Step 5: Solve for x
    x = 17,215,151,040.78/125,251.30
  6. Step 6: Final answer
    x = 137,444.89

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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.