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Finding the Third Proportional to 39.75 and 83.75

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Solution

The third proportional to 39.75 and 83.75 is: 176.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.75 : 83.75 = 83.75 : x
  2. Step 2: Convert to fraction form
    39.75/83.75 = 83.75/x
  3. Step 3: Cross multiply
    39.75x = 83.75 × 83.75
  4. Step 4: Simplify right side
    39.75x = 7,014.06
  5. Step 5: Solve for x
    x = 7,014.06/39.75
  6. Step 6: Final answer
    x = 176.45

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.