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Finding the Fourth Proportional to 198,657.20, 297,726.60 and 80,231.60

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Solution

The fourth proportional to 198,657.20, 297,726.60 and 80,231.60 is: 120,242.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,657.20 : 297,726.60 = 80,231.60 : x
  2. Step 2: Convert to fraction form
    198,657.20/297,726.60 = 80,231.60/x
  3. Step 3: Cross multiply
    198,657.20x = 297,726.60 × 80,231.60
  4. Step 4: Simplify right side
    198,657.20x = 23,887,081,480.56
  5. Step 5: Solve for x
    x = 23,887,081,480.56/198,657.20
  6. Step 6: Final answer
    x = 120,242.72

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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.