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Finding the Fourth Proportional to 103.28, 154.96 and 49.18

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Solution

The fourth proportional to 103.28, 154.96 and 49.18 is: 73.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.28 : 154.96 = 49.18 : x
  2. Step 2: Convert to fraction form
    103.28/154.96 = 49.18/x
  3. Step 3: Cross multiply
    103.28x = 154.96 × 49.18
  4. Step 4: Simplify right side
    103.28x = 7,619.91
  5. Step 5: Solve for x
    x = 7,619.91/103.28
  6. Step 6: Final answer
    x = 73.78

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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.