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Finding the Fourth Proportional to 118,368.20, 177,321.90 and 71,481.80

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Solution

The fourth proportional to 118,368.20, 177,321.90 and 71,481.80 is: 107,083.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,368.20 : 177,321.90 = 71,481.80 : x
  2. Step 2: Convert to fraction form
    118,368.20/177,321.90 = 71,481.80/x
  3. Step 3: Cross multiply
    118,368.20x = 177,321.90 × 71,481.80
  4. Step 4: Simplify right side
    118,368.20x = 12,675,288,591.42
  5. Step 5: Solve for x
    x = 12,675,288,591.42/118,368.20
  6. Step 6: Final answer
    x = 107,083.56

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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.