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Finding the Fourth Proportional to 269,820.80, 404,990.40 and 136,851.20

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Solution

The fourth proportional to 269,820.80, 404,990.40 and 136,851.20 is: 205,408.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,820.80 : 404,990.40 = 136,851.20 : x
  2. Step 2: Convert to fraction form
    269,820.80/404,990.40 = 136,851.20/x
  3. Step 3: Cross multiply
    269,820.80x = 404,990.40 × 136,851.20
  4. Step 4: Simplify right side
    269,820.80x = 55,423,422,228.48
  5. Step 5: Solve for x
    x = 55,423,422,228.48/269,820.80
  6. Step 6: Final answer
    x = 205,408.26

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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.