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Finding the Fourth Proportional to 92.29, 127.31 and 61.22

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Solution

The fourth proportional to 92.29, 127.31 and 61.22 is: 84.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.29 : 127.31 = 61.22 : x
  2. Step 2: Convert to fraction form
    92.29/127.31 = 61.22/x
  3. Step 3: Cross multiply
    92.29x = 127.31 × 61.22
  4. Step 4: Simplify right side
    92.29x = 7,793.28
  5. Step 5: Solve for x
    x = 7,793.28/92.29
  6. Step 6: Final answer
    x = 84.45

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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.