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Finding the Fourth Proportional to 118,658.60, 177,987.90 and 72,002.60

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Solution

The fourth proportional to 118,658.60, 177,987.90 and 72,002.60 is: 108,003.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,658.60 : 177,987.90 = 72,002.60 : x
  2. Step 2: Convert to fraction form
    118,658.60/177,987.90 = 72,002.60/x
  3. Step 3: Cross multiply
    118,658.60x = 177,987.90 × 72,002.60
  4. Step 4: Simplify right side
    118,658.60x = 12,815,591,568.54
  5. Step 5: Solve for x
    x = 12,815,591,568.54/118,658.60
  6. Step 6: Final answer
    x = 108,003.90

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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.