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Finding the Fourth Proportional to 92.42, 127.28 and 86.04

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Solution

The fourth proportional to 92.42, 127.28 and 86.04 is: 118.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.42 : 127.28 = 86.04 : x
  2. Step 2: Convert to fraction form
    92.42/127.28 = 86.04/x
  3. Step 3: Cross multiply
    92.42x = 127.28 × 86.04
  4. Step 4: Simplify right side
    92.42x = 10,951.17
  5. Step 5: Solve for x
    x = 10,951.17/92.42
  6. Step 6: Final answer
    x = 118.49

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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.