Home / 80,209.89-120,273.30-42,759.90

Finding the Fourth Proportional to 80,209.89, 120,273.30 and 42,759.90

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Solution

The fourth proportional to 80,209.89, 120,273.30 and 42,759.90 is: 64,117.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,209.89 : 120,273.30 = 42,759.90 : x
  2. Step 2: Convert to fraction form
    80,209.89/120,273.30 = 42,759.90/x
  3. Step 3: Cross multiply
    80,209.89x = 120,273.30 × 42,759.90
  4. Step 4: Simplify right side
    80,209.89x = 5,142,874,280.67
  5. Step 5: Solve for x
    x = 5,142,874,280.67/80,209.89
  6. Step 6: Final answer
    x = 64,117.71

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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.