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Finding the Fourth Proportional to 123,151.16, 169,958.22 and 68,720.43

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Solution

The fourth proportional to 123,151.16, 169,958.22 and 68,720.43 is: 94,839.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,151.16 : 169,958.22 = 68,720.43 : x
  2. Step 2: Convert to fraction form
    123,151.16/169,958.22 = 68,720.43/x
  3. Step 3: Cross multiply
    123,151.16x = 169,958.22 × 68,720.43
  4. Step 4: Simplify right side
    123,151.16x = 11,679,601,960.43
  5. Step 5: Solve for x
    x = 11,679,601,960.43/123,151.16
  6. Step 6: Final answer
    x = 94,839.56

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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.