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Finding the Fourth Proportional to 129.37, 194.23 and 123.91

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Solution

The fourth proportional to 129.37, 194.23 and 123.91 is: 186.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.37 : 194.23 = 123.91 : x
  2. Step 2: Convert to fraction form
    129.37/194.23 = 123.91/x
  3. Step 3: Cross multiply
    129.37x = 194.23 × 123.91
  4. Step 4: Simplify right side
    129.37x = 24,067.04
  5. Step 5: Solve for x
    x = 24,067.04/129.37
  6. Step 6: Final answer
    x = 186.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.