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Finding the Fourth Proportional to 67.62, 100.67 and 67.26

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Solution

The fourth proportional to 67.62, 100.67 and 67.26 is: 100.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.62 : 100.67 = 67.26 : x
  2. Step 2: Convert to fraction form
    67.62/100.67 = 67.26/x
  3. Step 3: Cross multiply
    67.62x = 100.67 × 67.26
  4. Step 4: Simplify right side
    67.62x = 6,770.73
  5. Step 5: Solve for x
    x = 6,770.73/67.62
  6. Step 6: Final answer
    x = 100.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.