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Finding the Fourth Proportional to 83.67, 125.55 and 77.55

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Solution

The fourth proportional to 83.67, 125.55 and 77.55 is: 116.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.67 : 125.55 = 77.55 : x
  2. Step 2: Convert to fraction form
    83.67/125.55 = 77.55/x
  3. Step 3: Cross multiply
    83.67x = 125.55 × 77.55
  4. Step 4: Simplify right side
    83.67x = 9,736.40
  5. Step 5: Solve for x
    x = 9,736.40/83.67
  6. Step 6: Final answer
    x = 116.37

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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.