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Finding the Fourth Proportional to 269,680.80, 404,780.40 and 136,711.20

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Solution

The fourth proportional to 269,680.80, 404,780.40 and 136,711.20 is: 205,198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,680.80 : 404,780.40 = 136,711.20 : x
  2. Step 2: Convert to fraction form
    269,680.80/404,780.40 = 136,711.20/x
  3. Step 3: Cross multiply
    269,680.80x = 404,780.40 × 136,711.20
  4. Step 4: Simplify right side
    269,680.80x = 55,338,014,220.48
  5. Step 5: Solve for x
    x = 55,338,014,220.48/269,680.80
  6. Step 6: Final answer
    x = 205,198.20

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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.