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Finding the Fourth Proportional to 79,757.43, 119,691.38 and 31,721.12

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Solution

The fourth proportional to 79,757.43, 119,691.38 and 31,721.12 is: 47,603.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,757.43 : 119,691.38 = 31,721.12 : x
  2. Step 2: Convert to fraction form
    79,757.43/119,691.38 = 31,721.12/x
  3. Step 3: Cross multiply
    79,757.43x = 119,691.38 × 31,721.12
  4. Step 4: Simplify right side
    79,757.43x = 3,796,743,870.88
  5. Step 5: Solve for x
    x = 3,796,743,870.88/79,757.43
  6. Step 6: Final answer
    x = 47,603.64

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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.