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Finding the Fourth Proportional to 67.48, 101.22 and 61.72

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Solution

The fourth proportional to 67.48, 101.22 and 61.72 is: 92.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.48 : 101.22 = 61.72 : x
  2. Step 2: Convert to fraction form
    67.48/101.22 = 61.72/x
  3. Step 3: Cross multiply
    67.48x = 101.22 × 61.72
  4. Step 4: Simplify right side
    67.48x = 6,247.30
  5. Step 5: Solve for x
    x = 6,247.30/67.48
  6. Step 6: Final answer
    x = 92.58

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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.