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Finding the Fourth Proportional to 101.52, 140.07 and 62.18

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Solution

The fourth proportional to 101.52, 140.07 and 62.18 is: 85.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.52 : 140.07 = 62.18 : x
  2. Step 2: Convert to fraction form
    101.52/140.07 = 62.18/x
  3. Step 3: Cross multiply
    101.52x = 140.07 × 62.18
  4. Step 4: Simplify right side
    101.52x = 8,708.85
  5. Step 5: Solve for x
    x = 8,708.85/101.52
  6. Step 6: Final answer
    x = 85.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.