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Finding the Third Proportional to 115.13 and 191.06

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Solution

The third proportional to 115.13 and 191.06 is: 317.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.13 : 191.06 = 191.06 : x
  2. Step 2: Convert to fraction form
    115.13/191.06 = 191.06/x
  3. Step 3: Cross multiply
    115.13x = 191.06 × 191.06
  4. Step 4: Simplify right side
    115.13x = 36,504.88
  5. Step 5: Solve for x
    x = 36,504.88/115.13
  6. Step 6: Final answer
    x = 317.09

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.