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Finding the Fourth Proportional to 120,517.80, 166,319.99 and 68,839.39

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Solution

The fourth proportional to 120,517.80, 166,319.99 and 68,839.39 is: 95,001.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,517.80 : 166,319.99 = 68,839.39 : x
  2. Step 2: Convert to fraction form
    120,517.80/166,319.99 = 68,839.39/x
  3. Step 3: Cross multiply
    120,517.80x = 166,319.99 × 68,839.39
  4. Step 4: Simplify right side
    120,517.80x = 11,449,366,656.41
  5. Step 5: Solve for x
    x = 11,449,366,656.41/120,517.80
  6. Step 6: Final answer
    x = 95,001.46

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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.