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Finding the Fourth Proportional to 269,745.20, 404,617.80 and 129,431.60

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Solution

The fourth proportional to 269,745.20, 404,617.80 and 129,431.60 is: 194,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,745.20 : 404,617.80 = 129,431.60 : x
  2. Step 2: Convert to fraction form
    269,745.20/404,617.80 = 129,431.60/x
  3. Step 3: Cross multiply
    269,745.20x = 404,617.80 × 129,431.60
  4. Step 4: Simplify right side
    269,745.20x = 52,370,329,242.48
  5. Step 5: Solve for x
    x = 52,370,329,242.48/269,745.20
  6. Step 6: Final answer
    x = 194,147.40

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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.