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Finding the Fourth Proportional to 68,891.64, 95,064.27 and 40,213.80

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Solution

The fourth proportional to 68,891.64, 95,064.27 and 40,213.80 is: 55,491.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,891.64 : 95,064.27 = 40,213.80 : x
  2. Step 2: Convert to fraction form
    68,891.64/95,064.27 = 40,213.80/x
  3. Step 3: Cross multiply
    68,891.64x = 95,064.27 × 40,213.80
  4. Step 4: Simplify right side
    68,891.64x = 3,822,895,540.93
  5. Step 5: Solve for x
    x = 3,822,895,540.93/68,891.64
  6. Step 6: Final answer
    x = 55,491.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.