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Finding the Third Proportional to 39.16 and 84.72

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Solution

The third proportional to 39.16 and 84.72 is: 183.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.16 : 84.72 = 84.72 : x
  2. Step 2: Convert to fraction form
    39.16/84.72 = 84.72/x
  3. Step 3: Cross multiply
    39.16x = 84.72 × 84.72
  4. Step 4: Simplify right side
    39.16x = 7,177.10
  5. Step 5: Solve for x
    x = 7,177.10/39.16
  6. Step 6: Final answer
    x = 183.30

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.