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Finding the Fourth Proportional to 269,628.80, 404,443.20 and 136,918.40

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Solution

The fourth proportional to 269,628.80, 404,443.20 and 136,918.40 is: 205,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,628.80 : 404,443.20 = 136,918.40 : x
  2. Step 2: Convert to fraction form
    269,628.80/404,443.20 = 136,918.40/x
  3. Step 3: Cross multiply
    269,628.80x = 404,443.20 × 136,918.40
  4. Step 4: Simplify right side
    269,628.80x = 55,375,715,834.88
  5. Step 5: Solve for x
    x = 55,375,715,834.88/269,628.80
  6. Step 6: Final answer
    x = 205,377.60

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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.