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Finding the Fourth Proportional to 88.33, 121.76 and 63.73

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Solution

The fourth proportional to 88.33, 121.76 and 63.73 is: 87.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.33 : 121.76 = 63.73 : x
  2. Step 2: Convert to fraction form
    88.33/121.76 = 63.73/x
  3. Step 3: Cross multiply
    88.33x = 121.76 × 63.73
  4. Step 4: Simplify right side
    88.33x = 7,759.16
  5. Step 5: Solve for x
    x = 7,759.16/88.33
  6. Step 6: Final answer
    x = 87.85

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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.