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Finding the Fourth Proportional to 124.49, 186.72 and 33.20

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Solution

The fourth proportional to 124.49, 186.72 and 33.20 is: 49.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.49 : 186.72 = 33.20 : x
  2. Step 2: Convert to fraction form
    124.49/186.72 = 33.20/x
  3. Step 3: Cross multiply
    124.49x = 186.72 × 33.20
  4. Step 4: Simplify right side
    124.49x = 6,198.17
  5. Step 5: Solve for x
    x = 6,198.17/124.49
  6. Step 6: Final answer
    x = 49.79

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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.