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Finding the Fourth Proportional to 266,544.20, 399,757.33 and 76,963.42

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Solution

The fourth proportional to 266,544.20, 399,757.33 and 76,963.42 is: 115,428.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,544.20 : 399,757.33 = 76,963.42 : x
  2. Step 2: Convert to fraction form
    266,544.20/399,757.33 = 76,963.42/x
  3. Step 3: Cross multiply
    266,544.20x = 399,757.33 × 76,963.42
  4. Step 4: Simplify right side
    266,544.20x = 30,766,690,095.07
  5. Step 5: Solve for x
    x = 30,766,690,095.07/266,544.20
  6. Step 6: Final answer
    x = 115,428.10

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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.