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Finding the Third Proportional to 64.13 and 84.80

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Solution

The third proportional to 64.13 and 84.80 is: 112.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.13 : 84.80 = 84.80 : x
  2. Step 2: Convert to fraction form
    64.13/84.80 = 84.80/x
  3. Step 3: Cross multiply
    64.13x = 84.80 × 84.80
  4. Step 4: Simplify right side
    64.13x = 7,190.51
  5. Step 5: Solve for x
    x = 7,190.51/64.13
  6. Step 6: Final answer
    x = 112.13

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.