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Finding the Third Proportional to 129.75 and 182.63

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Solution

The third proportional to 129.75 and 182.63 is: 257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.75 : 182.63 = 182.63 : x
  2. Step 2: Convert to fraction form
    129.75/182.63 = 182.63/x
  3. Step 3: Cross multiply
    129.75x = 182.63 × 182.63
  4. Step 4: Simplify right side
    129.75x = 33,351.89
  5. Step 5: Solve for x
    x = 33,351.89/129.75
  6. Step 6: Final answer
    x = 257.05

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.