Home / 206,172.82-309,319.17-86,286.34

Finding the Fourth Proportional to 206,172.82, 309,319.17 and 86,286.34

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Solution

The fourth proportional to 206,172.82, 309,319.17 and 86,286.34 is: 129,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,172.82 : 309,319.17 = 86,286.34 : x
  2. Step 2: Convert to fraction form
    206,172.82/309,319.17 = 86,286.34/x
  3. Step 3: Cross multiply
    206,172.82x = 309,319.17 × 86,286.34
  4. Step 4: Simplify right side
    206,172.82x = 26,690,019,071.14
  5. Step 5: Solve for x
    x = 26,690,019,071.14/206,172.82
  6. Step 6: Final answer
    x = 129,454.60

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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.