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Finding the Fourth Proportional to 68,493.96, 94,491.72 and 40,186.80

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Solution

The fourth proportional to 68,493.96, 94,491.72 and 40,186.80 is: 55,440.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,493.96 : 94,491.72 = 40,186.80 : x
  2. Step 2: Convert to fraction form
    68,493.96/94,491.72 = 40,186.80/x
  3. Step 3: Cross multiply
    68,493.96x = 94,491.72 × 40,186.80
  4. Step 4: Simplify right side
    68,493.96x = 3,797,319,853.30
  5. Step 5: Solve for x
    x = 3,797,319,853.30/68,493.96
  6. Step 6: Final answer
    x = 55,440.21

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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.