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Finding the Fourth Proportional to 122,177.69, 168,588.10 and 68,458.49

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Solution

The fourth proportional to 122,177.69, 168,588.10 and 68,458.49 is: 94,463.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,177.69 : 168,588.10 = 68,458.49 : x
  2. Step 2: Convert to fraction form
    122,177.69/168,588.10 = 68,458.49/x
  3. Step 3: Cross multiply
    122,177.69x = 168,588.10 × 68,458.49
  4. Step 4: Simplify right side
    122,177.69x = 11,541,286,757.97
  5. Step 5: Solve for x
    x = 11,541,286,757.97/122,177.69
  6. Step 6: Final answer
    x = 94,463.13

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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.