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Finding the Fourth Proportional to 266,781.89, 400,143.34 and 67,102.36

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Solution

The fourth proportional to 266,781.89, 400,143.34 and 67,102.36 is: 100,646.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,781.89 : 400,143.34 = 67,102.36 : x
  2. Step 2: Convert to fraction form
    266,781.89/400,143.34 = 67,102.36/x
  3. Step 3: Cross multiply
    266,781.89x = 400,143.34 × 67,102.36
  4. Step 4: Simplify right side
    266,781.89x = 26,850,561,535.80
  5. Step 5: Solve for x
    x = 26,850,561,535.80/266,781.89
  6. Step 6: Final answer
    x = 100,646.12

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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.