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Finding the Fourth Proportional to 266,418.72, 399,679.92 and 126,100.80

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Solution

The fourth proportional to 266,418.72, 399,679.92 and 126,100.80 is: 189,175.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,418.72 : 399,679.92 = 126,100.80 : x
  2. Step 2: Convert to fraction form
    266,418.72/399,679.92 = 126,100.80/x
  3. Step 3: Cross multiply
    266,418.72x = 399,679.92 × 126,100.80
  4. Step 4: Simplify right side
    266,418.72x = 50,399,957,655.94
  5. Step 5: Solve for x
    x = 50,399,957,655.94/266,418.72
  6. Step 6: Final answer
    x = 189,175.74

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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.