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Finding the Fourth Proportional to 101.15, 150.66 and 100.54

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Solution

The fourth proportional to 101.15, 150.66 and 100.54 is: 149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.15 : 150.66 = 100.54 : x
  2. Step 2: Convert to fraction form
    101.15/150.66 = 100.54/x
  3. Step 3: Cross multiply
    101.15x = 150.66 × 100.54
  4. Step 4: Simplify right side
    101.15x = 15,147.54
  5. Step 5: Solve for x
    x = 15,147.54/101.15
  6. Step 6: Final answer
    x = 149.76

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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.