Home / 198,764.20-297,915.90-80,357.80

Finding the Fourth Proportional to 198,764.20, 297,915.90 and 80,357.80

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Solution

The fourth proportional to 198,764.20, 297,915.90 and 80,357.80 is: 120,443.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,764.20 : 297,915.90 = 80,357.80 : x
  2. Step 2: Convert to fraction form
    198,764.20/297,915.90 = 80,357.80/x
  3. Step 3: Cross multiply
    198,764.20x = 297,915.90 × 80,357.80
  4. Step 4: Simplify right side
    198,764.20x = 23,939,866,309.02
  5. Step 5: Solve for x
    x = 23,939,866,309.02/198,764.20
  6. Step 6: Final answer
    x = 120,443.55

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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.