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Finding the Fourth Proportional to 101.10, 151.67 and 49.79

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Solution

The fourth proportional to 101.10, 151.67 and 49.79 is: 74.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.10 : 151.67 = 49.79 : x
  2. Step 2: Convert to fraction form
    101.10/151.67 = 49.79/x
  3. Step 3: Cross multiply
    101.10x = 151.67 × 49.79
  4. Step 4: Simplify right side
    101.10x = 7,550.64
  5. Step 5: Solve for x
    x = 7,550.64/101.10
  6. Step 6: Final answer
    x = 74.68

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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.