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Finding the Third Proportional to 36.19 and 78.79

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Solution

The third proportional to 36.19 and 78.79 is: 171.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.19 : 78.79 = 78.79 : x
  2. Step 2: Convert to fraction form
    36.19/78.79 = 78.79/x
  3. Step 3: Cross multiply
    36.19x = 78.79 × 78.79
  4. Step 4: Simplify right side
    36.19x = 6,207.10
  5. Step 5: Solve for x
    x = 6,207.10/36.19
  6. Step 6: Final answer
    x = 171.52

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.