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Finding the Fourth Proportional to 88.38, 133.34 and 84.27

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Solution

The fourth proportional to 88.38, 133.34 and 84.27 is: 127.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.38 : 133.34 = 84.27 : x
  2. Step 2: Convert to fraction form
    88.38/133.34 = 84.27/x
  3. Step 3: Cross multiply
    88.38x = 133.34 × 84.27
  4. Step 4: Simplify right side
    88.38x = 11,236.14
  5. Step 5: Solve for x
    x = 11,236.14/88.38
  6. Step 6: Final answer
    x = 127.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.