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Finding the Fourth Proportional to 123.29, 170.13 and 92.23

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Solution

The fourth proportional to 123.29, 170.13 and 92.23 is: 127.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.29 : 170.13 = 92.23 : x
  2. Step 2: Convert to fraction form
    123.29/170.13 = 92.23/x
  3. Step 3: Cross multiply
    123.29x = 170.13 × 92.23
  4. Step 4: Simplify right side
    123.29x = 15,690.66
  5. Step 5: Solve for x
    x = 15,690.66/123.29
  6. Step 6: Final answer
    x = 127.27

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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.