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Finding the Third Proportional to 102.56 and 130.13

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Solution

The third proportional to 102.56 and 130.13 is: 165.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.56 : 130.13 = 130.13 : x
  2. Step 2: Convert to fraction form
    102.56/130.13 = 130.13/x
  3. Step 3: Cross multiply
    102.56x = 130.13 × 130.13
  4. Step 4: Simplify right side
    102.56x = 16,932.52
  5. Step 5: Solve for x
    x = 16,932.52/102.56
  6. Step 6: Final answer
    x = 165.09

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.