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Finding the Fourth Proportional to 66,997.04, 100,514.21 and 54,633.78

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Solution

The fourth proportional to 66,997.04, 100,514.21 and 54,633.78 is: 81,965.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,997.04 : 100,514.21 = 54,633.78 : x
  2. Step 2: Convert to fraction form
    66,997.04/100,514.21 = 54,633.78/x
  3. Step 3: Cross multiply
    66,997.04x = 100,514.21 × 54,633.78
  4. Step 4: Simplify right side
    66,997.04x = 5,491,470,962.84
  5. Step 5: Solve for x
    x = 5,491,470,962.84/66,997.04
  6. Step 6: Final answer
    x = 81,965.88

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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.