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Finding the Fourth Proportional to 125,161.72, 187,446.12 and 98,689.30

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Solution

The fourth proportional to 125,161.72, 187,446.12 and 98,689.30 is: 147,800.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,161.72 : 187,446.12 = 98,689.30 : x
  2. Step 2: Convert to fraction form
    125,161.72/187,446.12 = 98,689.30/x
  3. Step 3: Cross multiply
    125,161.72x = 187,446.12 × 98,689.30
  4. Step 4: Simplify right side
    125,161.72x = 18,498,926,370.52
  5. Step 5: Solve for x
    x = 18,498,926,370.52/125,161.72
  6. Step 6: Final answer
    x = 147,800.19

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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.