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Finding the Fourth Proportional to 129,789.80, 194,684.70 and 88,010.60

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Solution

The fourth proportional to 129,789.80, 194,684.70 and 88,010.60 is: 132,015.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.80 : 194,684.70 = 88,010.60 : x
  2. Step 2: Convert to fraction form
    129,789.80/194,684.70 = 88,010.60/x
  3. Step 3: Cross multiply
    129,789.80x = 194,684.70 × 88,010.60
  4. Step 4: Simplify right side
    129,789.80x = 17,134,317,257.82
  5. Step 5: Solve for x
    x = 17,134,317,257.82/129,789.80
  6. Step 6: Final answer
    x = 132,015.90

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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.