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Finding the Fourth Proportional to 266,708.20, 399,978.84 and 89,173.80

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Solution

The fourth proportional to 266,708.20, 399,978.84 and 89,173.80 is: 133,732.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,708.20 : 399,978.84 = 89,173.80 : x
  2. Step 2: Convert to fraction form
    266,708.20/399,978.84 = 89,173.80/x
  3. Step 3: Cross multiply
    266,708.20x = 399,978.84 × 89,173.80
  4. Step 4: Simplify right side
    266,708.20x = 35,667,633,082.39
  5. Step 5: Solve for x
    x = 35,667,633,082.39/266,708.20
  6. Step 6: Final answer
    x = 133,732.80

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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.