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Finding the Fourth Proportional to 206,630.40, 309,974.40 and 88,300.80

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Solution

The fourth proportional to 206,630.40, 309,974.40 and 88,300.80 is: 132,463.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,630.40 : 309,974.40 = 88,300.80 : x
  2. Step 2: Convert to fraction form
    206,630.40/309,974.40 = 88,300.80/x
  3. Step 3: Cross multiply
    206,630.40x = 309,974.40 × 88,300.80
  4. Step 4: Simplify right side
    206,630.40x = 27,370,987,499.52
  5. Step 5: Solve for x
    x = 27,370,987,499.52/206,630.40
  6. Step 6: Final answer
    x = 132,463.51

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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.