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Finding the Third Proportional to 17.09 and 36.70

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Solution

The third proportional to 17.09 and 36.70 is: 78.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.09 : 36.70 = 36.70 : x
  2. Step 2: Convert to fraction form
    17.09/36.70 = 36.70/x
  3. Step 3: Cross multiply
    17.09x = 36.70 × 36.70
  4. Step 4: Simplify right side
    17.09x = 1,347.12
  5. Step 5: Solve for x
    x = 1,347.12/17.09
  6. Step 6: Final answer
    x = 78.84

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.