Home / 198,679.20-297,788.40-80,272.80

Finding the Fourth Proportional to 198,679.20, 297,788.40 and 80,272.80

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Solution

The fourth proportional to 198,679.20, 297,788.40 and 80,272.80 is: 120,316.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,679.20 : 297,788.40 = 80,272.80 : x
  2. Step 2: Convert to fraction form
    198,679.20/297,788.40 = 80,272.80/x
  3. Step 3: Cross multiply
    198,679.20x = 297,788.40 × 80,272.80
  4. Step 4: Simplify right side
    198,679.20x = 23,904,308,675.52
  5. Step 5: Solve for x
    x = 23,904,308,675.52/198,679.20
  6. Step 6: Final answer
    x = 120,316.11

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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.