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Finding the Fourth Proportional to 67.22, 100.87 and 35.18

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Solution

The fourth proportional to 67.22, 100.87 and 35.18 is: 52.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.22 : 100.87 = 35.18 : x
  2. Step 2: Convert to fraction form
    67.22/100.87 = 35.18/x
  3. Step 3: Cross multiply
    67.22x = 100.87 × 35.18
  4. Step 4: Simplify right side
    67.22x = 3,548.61
  5. Step 5: Solve for x
    x = 3,548.61/67.22
  6. Step 6: Final answer
    x = 52.79

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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.