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Finding the Fourth Proportional to 101,578.29, 140,108.41 and 69,691.83

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Solution

The fourth proportional to 101,578.29, 140,108.41 and 69,691.83 is: 96,126.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,578.29 : 140,108.41 = 69,691.83 : x
  2. Step 2: Convert to fraction form
    101,578.29/140,108.41 = 69,691.83/x
  3. Step 3: Cross multiply
    101,578.29x = 140,108.41 × 69,691.83
  4. Step 4: Simplify right side
    101,578.29x = 9,764,411,053.00
  5. Step 5: Solve for x
    x = 9,764,411,053.00/101,578.29
  6. Step 6: Final answer
    x = 96,126.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.