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Finding the Fourth Proportional to 49.12, 67.66 and 47.56

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Solution

The fourth proportional to 49.12, 67.66 and 47.56 is: 65.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.12 : 67.66 = 47.56 : x
  2. Step 2: Convert to fraction form
    49.12/67.66 = 47.56/x
  3. Step 3: Cross multiply
    49.12x = 67.66 × 47.56
  4. Step 4: Simplify right side
    49.12x = 3,217.91
  5. Step 5: Solve for x
    x = 3,217.91/49.12
  6. Step 6: Final answer
    x = 65.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.