Home / 206,456.20-309,528.42-135,396.74

Finding the Fourth Proportional to 206,456.20, 309,528.42 and 135,396.74

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Solution

The fourth proportional to 206,456.20, 309,528.42 and 135,396.74 is: 202,992.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,456.20 : 309,528.42 = 135,396.74 : x
  2. Step 2: Convert to fraction form
    206,456.20/309,528.42 = 135,396.74/x
  3. Step 3: Cross multiply
    206,456.20x = 309,528.42 × 135,396.74
  4. Step 4: Simplify right side
    206,456.20x = 41,909,139,005.35
  5. Step 5: Solve for x
    x = 41,909,139,005.35/206,456.20
  6. Step 6: Final answer
    x = 202,992.88

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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.