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Finding the Fourth Proportional to 49.56, 67.97 and 48.79

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Solution

The fourth proportional to 49.56, 67.97 and 48.79 is: 66.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.56 : 67.97 = 48.79 : x
  2. Step 2: Convert to fraction form
    49.56/67.97 = 48.79/x
  3. Step 3: Cross multiply
    49.56x = 67.97 × 48.79
  4. Step 4: Simplify right side
    49.56x = 3,316.26
  5. Step 5: Solve for x
    x = 3,316.26/49.56
  6. Step 6: Final answer
    x = 66.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.