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Finding the Fourth Proportional to 65,387.85, 98,141.91 and 50,691.21

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Solution

The fourth proportional to 65,387.85, 98,141.91 and 50,691.21 is: 76,083.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,387.85 : 98,141.91 = 50,691.21 : x
  2. Step 2: Convert to fraction form
    65,387.85/98,141.91 = 50,691.21/x
  3. Step 3: Cross multiply
    65,387.85x = 98,141.91 × 50,691.21
  4. Step 4: Simplify right side
    65,387.85x = 4,974,932,169.61
  5. Step 5: Solve for x
    x = 4,974,932,169.61/65,387.85
  6. Step 6: Final answer
    x = 76,083.43

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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.