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Finding the Fourth Proportional to 103.82, 155.48 and 101.20

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Solution

The fourth proportional to 103.82, 155.48 and 101.20 is: 151.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.82 : 155.48 = 101.20 : x
  2. Step 2: Convert to fraction form
    103.82/155.48 = 101.20/x
  3. Step 3: Cross multiply
    103.82x = 155.48 × 101.20
  4. Step 4: Simplify right side
    103.82x = 15,734.58
  5. Step 5: Solve for x
    x = 15,734.58/103.82
  6. Step 6: Final answer
    x = 151.56

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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.