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Finding the Fourth Proportional to 88.33, 120.82 and 86.92

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Solution

The fourth proportional to 88.33, 120.82 and 86.92 is: 118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.33 : 120.82 = 86.92 : x
  2. Step 2: Convert to fraction form
    88.33/120.82 = 86.92/x
  3. Step 3: Cross multiply
    88.33x = 120.82 × 86.92
  4. Step 4: Simplify right side
    88.33x = 10,500.93
  5. Step 5: Solve for x
    x = 10,500.93/88.33
  6. Step 6: Final answer
    x = 118.88

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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.