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Finding the Fourth Proportional to 269,531.20, 404,223.90 and 79,991.20

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Solution

The fourth proportional to 269,531.20, 404,223.90 and 79,991.20 is: 119,965.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,531.20 : 404,223.90 = 79,991.20 : x
  2. Step 2: Convert to fraction form
    269,531.20/404,223.90 = 79,991.20/x
  3. Step 3: Cross multiply
    269,531.20x = 404,223.90 × 79,991.20
  4. Step 4: Simplify right side
    269,531.20x = 32,334,354,829.68
  5. Step 5: Solve for x
    x = 32,334,354,829.68/269,531.20
  6. Step 6: Final answer
    x = 119,965.16

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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.