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Finding the Fourth Proportional to 67.14, 101.57 and 66.60

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Solution

The fourth proportional to 67.14, 101.57 and 66.60 is: 100.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.14 : 101.57 = 66.60 : x
  2. Step 2: Convert to fraction form
    67.14/101.57 = 66.60/x
  3. Step 3: Cross multiply
    67.14x = 101.57 × 66.60
  4. Step 4: Simplify right side
    67.14x = 6,764.23
  5. Step 5: Solve for x
    x = 6,764.23/67.14
  6. Step 6: Final answer
    x = 100.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.