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Finding the Fourth Proportional to 101.28, 151.15 and 100.66

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Solution

The fourth proportional to 101.28, 151.15 and 100.66 is: 150.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.28 : 151.15 = 100.66 : x
  2. Step 2: Convert to fraction form
    101.28/151.15 = 100.66/x
  3. Step 3: Cross multiply
    101.28x = 151.15 × 100.66
  4. Step 4: Simplify right side
    101.28x = 15,214.76
  5. Step 5: Solve for x
    x = 15,214.76/101.28
  6. Step 6: Final answer
    x = 150.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.