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Finding the Fourth Proportional to 123,121.63, 169,897.66 and 69,419.85

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Solution

The fourth proportional to 123,121.63, 169,897.66 and 69,419.85 is: 95,793.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,121.63 : 169,897.66 = 69,419.85 : x
  2. Step 2: Convert to fraction form
    123,121.63/169,897.66 = 69,419.85/x
  3. Step 3: Cross multiply
    123,121.63x = 169,897.66 × 69,419.85
  4. Step 4: Simplify right side
    123,121.63x = 11,794,270,072.55
  5. Step 5: Solve for x
    x = 11,794,270,072.55/123,121.63
  6. Step 6: Final answer
    x = 95,793.65

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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.