Home / 80,518.20-120,729.30-49,375.80

Finding the Fourth Proportional to 80,518.20, 120,729.30 and 49,375.80

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Solution

The fourth proportional to 80,518.20, 120,729.30 and 49,375.80 is: 74,034.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,518.20 : 120,729.30 = 49,375.80 : x
  2. Step 2: Convert to fraction form
    80,518.20/120,729.30 = 49,375.80/x
  3. Step 3: Cross multiply
    80,518.20x = 120,729.30 × 49,375.80
  4. Step 4: Simplify right side
    80,518.20x = 5,961,105,770.94
  5. Step 5: Solve for x
    x = 5,961,105,770.94/80,518.20
  6. Step 6: Final answer
    x = 74,034.27

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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.