Home / 206,170.38-309,157.65-79,869.78

Finding the Fourth Proportional to 206,170.38, 309,157.65 and 79,869.78

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Solution

The fourth proportional to 206,170.38, 309,157.65 and 79,869.78 is: 119,766.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,170.38 : 309,157.65 = 79,869.78 : x
  2. Step 2: Convert to fraction form
    206,170.38/309,157.65 = 79,869.78/x
  3. Step 3: Cross multiply
    206,170.38x = 309,157.65 × 79,869.78
  4. Step 4: Simplify right side
    206,170.38x = 24,692,353,490.82
  5. Step 5: Solve for x
    x = 24,692,353,490.82/206,170.38
  6. Step 6: Final answer
    x = 119,766.74

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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.