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Finding the Fourth Proportional to 129.38, 179.29 and 127.35

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Solution

The fourth proportional to 129.38, 179.29 and 127.35 is: 176.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.38 : 179.29 = 127.35 : x
  2. Step 2: Convert to fraction form
    129.38/179.29 = 127.35/x
  3. Step 3: Cross multiply
    129.38x = 179.29 × 127.35
  4. Step 4: Simplify right side
    129.38x = 22,832.74
  5. Step 5: Solve for x
    x = 22,832.74/129.38
  6. Step 6: Final answer
    x = 176.48

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.