Home / 206,987.17-309,861.92-126,772.57

Finding the Fourth Proportional to 206,987.17, 309,861.92 and 126,772.57

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Solution

The fourth proportional to 206,987.17, 309,861.92 and 126,772.57 is: 189,779.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,987.17 : 309,861.92 = 126,772.57 : x
  2. Step 2: Convert to fraction form
    206,987.17/309,861.92 = 126,772.57/x
  3. Step 3: Cross multiply
    206,987.17x = 309,861.92 × 126,772.57
  4. Step 4: Simplify right side
    206,987.17x = 39,281,991,943.53
  5. Step 5: Solve for x
    x = 39,281,991,943.53/206,987.17
  6. Step 6: Final answer
    x = 189,779.84

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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.