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Finding the Fourth Proportional to 266,028.91, 399,100.38 and 76,487.60

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Solution

The fourth proportional to 266,028.91, 399,100.38 and 76,487.60 is: 114,747.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,028.91 : 399,100.38 = 76,487.60 : x
  2. Step 2: Convert to fraction form
    266,028.91/399,100.38 = 76,487.60/x
  3. Step 3: Cross multiply
    266,028.91x = 399,100.38 × 76,487.60
  4. Step 4: Simplify right side
    266,028.91x = 30,526,228,691.27
  5. Step 5: Solve for x
    x = 30,526,228,691.27/266,028.91
  6. Step 6: Final answer
    x = 114,747.79

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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.