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Finding the Fourth Proportional to 91.62, 127.06 and 88.38

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Solution

The fourth proportional to 91.62, 127.06 and 88.38 is: 122.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.62 : 127.06 = 88.38 : x
  2. Step 2: Convert to fraction form
    91.62/127.06 = 88.38/x
  3. Step 3: Cross multiply
    91.62x = 127.06 × 88.38
  4. Step 4: Simplify right side
    91.62x = 11,229.56
  5. Step 5: Solve for x
    x = 11,229.56/91.62
  6. Step 6: Final answer
    x = 122.57

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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.