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Finding the Fourth Proportional to 206,636.40, 309,983.40 and 88,306.80

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Solution

The fourth proportional to 206,636.40, 309,983.40 and 88,306.80 is: 132,472.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,636.40 : 309,983.40 = 88,306.80 : x
  2. Step 2: Convert to fraction form
    206,636.40/309,983.40 = 88,306.80/x
  3. Step 3: Cross multiply
    206,636.40x = 309,983.40 × 88,306.80
  4. Step 4: Simplify right side
    206,636.40x = 27,373,642,107.12
  5. Step 5: Solve for x
    x = 27,373,642,107.12/206,636.40
  6. Step 6: Final answer
    x = 132,472.51

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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.