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Finding the Fourth Proportional to 121.66, 182.56 and 63.88

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Solution

The fourth proportional to 121.66, 182.56 and 63.88 is: 95.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.66 : 182.56 = 63.88 : x
  2. Step 2: Convert to fraction form
    121.66/182.56 = 63.88/x
  3. Step 3: Cross multiply
    121.66x = 182.56 × 63.88
  4. Step 4: Simplify right side
    121.66x = 11,661.93
  5. Step 5: Solve for x
    x = 11,661.93/121.66
  6. Step 6: Final answer
    x = 95.86

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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.