Home / 198,765.20-297,917.40-80,358.80

Finding the Fourth Proportional to 198,765.20, 297,917.40 and 80,358.80

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Solution

The fourth proportional to 198,765.20, 297,917.40 and 80,358.80 is: 120,445.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,765.20 : 297,917.40 = 80,358.80 : x
  2. Step 2: Convert to fraction form
    198,765.20/297,917.40 = 80,358.80/x
  3. Step 3: Cross multiply
    198,765.20x = 297,917.40 × 80,358.80
  4. Step 4: Simplify right side
    198,765.20x = 23,940,284,763.12
  5. Step 5: Solve for x
    x = 23,940,284,763.12/198,765.20
  6. Step 6: Final answer
    x = 120,445.05

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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.