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Finding the Fourth Proportional to 101.20, 151.72 and 60.65

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Solution

The fourth proportional to 101.20, 151.72 and 60.65 is: 90.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.20 : 151.72 = 60.65 : x
  2. Step 2: Convert to fraction form
    101.20/151.72 = 60.65/x
  3. Step 3: Cross multiply
    101.20x = 151.72 × 60.65
  4. Step 4: Simplify right side
    101.20x = 9,200.91
  5. Step 5: Solve for x
    x = 9,200.91/101.20
  6. Step 6: Final answer
    x = 90.92

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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.