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Finding the Fourth Proportional to 129.25, 192.53 and 123.43

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Solution

The fourth proportional to 129.25, 192.53 and 123.43 is: 183.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.25 : 192.53 = 123.43 : x
  2. Step 2: Convert to fraction form
    129.25/192.53 = 123.43/x
  3. Step 3: Cross multiply
    129.25x = 192.53 × 123.43
  4. Step 4: Simplify right side
    129.25x = 23,763.98
  5. Step 5: Solve for x
    x = 23,763.98/129.25
  6. Step 6: Final answer
    x = 183.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.