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Finding the Fourth Proportional to 83.74, 125.53 and 67.67

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Solution

The fourth proportional to 83.74, 125.53 and 67.67 is: 101.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.74 : 125.53 = 67.67 : x
  2. Step 2: Convert to fraction form
    83.74/125.53 = 67.67/x
  3. Step 3: Cross multiply
    83.74x = 125.53 × 67.67
  4. Step 4: Simplify right side
    83.74x = 8,494.62
  5. Step 5: Solve for x
    x = 8,494.62/83.74
  6. Step 6: Final answer
    x = 101.44

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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.