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Finding the Fourth Proportional to 125,309.52, 187,631.73 and 98,019.90

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Solution

The fourth proportional to 125,309.52, 187,631.73 and 98,019.90 is: 146,769.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,309.52 : 187,631.73 = 98,019.90 : x
  2. Step 2: Convert to fraction form
    125,309.52/187,631.73 = 98,019.90/x
  3. Step 3: Cross multiply
    125,309.52x = 187,631.73 × 98,019.90
  4. Step 4: Simplify right side
    125,309.52x = 18,391,643,411.43
  5. Step 5: Solve for x
    x = 18,391,643,411.43/125,309.52
  6. Step 6: Final answer
    x = 146,769.72

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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.