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Finding the Fourth Proportional to 206,600.80, 309,382.80 and 136,098.40

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Solution

The fourth proportional to 206,600.80, 309,382.80 and 136,098.40 is: 203,806.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,600.80 : 309,382.80 = 136,098.40 : x
  2. Step 2: Convert to fraction form
    206,600.80/309,382.80 = 136,098.40/x
  3. Step 3: Cross multiply
    206,600.80x = 309,382.80 × 136,098.40
  4. Step 4: Simplify right side
    206,600.80x = 42,106,504,067.52
  5. Step 5: Solve for x
    x = 42,106,504,067.52/206,600.80
  6. Step 6: Final answer
    x = 203,806.10

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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.