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Finding the Fourth Proportional to 88.27, 122.38 and 83.66

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Solution

The fourth proportional to 88.27, 122.38 and 83.66 is: 115.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.27 : 122.38 = 83.66 : x
  2. Step 2: Convert to fraction form
    88.27/122.38 = 83.66/x
  3. Step 3: Cross multiply
    88.27x = 122.38 × 83.66
  4. Step 4: Simplify right side
    88.27x = 10,237.49
  5. Step 5: Solve for x
    x = 10,237.49/88.27
  6. Step 6: Final answer
    x = 115.98

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.