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Finding the Third Proportional to 129.63 and 181.50

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Solution

The third proportional to 129.63 and 181.50 is: 254.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.63 : 181.50 = 181.50 : x
  2. Step 2: Convert to fraction form
    129.63/181.50 = 181.50/x
  3. Step 3: Cross multiply
    129.63x = 181.50 × 181.50
  4. Step 4: Simplify right side
    129.63x = 32,942.25
  5. Step 5: Solve for x
    x = 32,942.25/129.63
  6. Step 6: Final answer
    x = 254.14

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.