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Finding the Fourth Proportional to 122,304.80, 168,708.94 and 76,910.78

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Solution

The fourth proportional to 122,304.80, 168,708.94 and 76,910.78 is: 106,091.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,304.80 : 168,708.94 = 76,910.78 : x
  2. Step 2: Convert to fraction form
    122,304.80/168,708.94 = 76,910.78/x
  3. Step 3: Cross multiply
    122,304.80x = 168,708.94 × 76,910.78
  4. Step 4: Simplify right side
    122,304.80x = 12,975,535,132.55
  5. Step 5: Solve for x
    x = 12,975,535,132.55/122,304.80
  6. Step 6: Final answer
    x = 106,091.79

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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.