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Finding the Fourth Proportional to 123,958.17, 171,003.85 and 89,891.92

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Solution

The fourth proportional to 123,958.17, 171,003.85 and 89,891.92 is: 124,008.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,958.17 : 171,003.85 = 89,891.92 : x
  2. Step 2: Convert to fraction form
    123,958.17/171,003.85 = 89,891.92/x
  3. Step 3: Cross multiply
    123,958.17x = 171,003.85 × 89,891.92
  4. Step 4: Simplify right side
    123,958.17x = 15,371,864,403.89
  5. Step 5: Solve for x
    x = 15,371,864,403.89/123,958.17
  6. Step 6: Final answer
    x = 124,008.48

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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.