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Finding the Fourth Proportional to 136,062.48, 203,785.96 and 72,770.80

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Solution

The fourth proportional to 136,062.48, 203,785.96 and 72,770.80 is: 108,991.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,062.48 : 203,785.96 = 72,770.80 : x
  2. Step 2: Convert to fraction form
    136,062.48/203,785.96 = 72,770.80/x
  3. Step 3: Cross multiply
    136,062.48x = 203,785.96 × 72,770.80
  4. Step 4: Simplify right side
    136,062.48x = 14,829,667,337.97
  5. Step 5: Solve for x
    x = 14,829,667,337.97/136,062.48
  6. Step 6: Final answer
    x = 108,991.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.