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Finding the Third Proportional to 77.25 and 163.50

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Solution

The third proportional to 77.25 and 163.50 is: 346.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.25 : 163.50 = 163.50 : x
  2. Step 2: Convert to fraction form
    77.25/163.50 = 163.50/x
  3. Step 3: Cross multiply
    77.25x = 163.50 × 163.50
  4. Step 4: Simplify right side
    77.25x = 26,732.25
  5. Step 5: Solve for x
    x = 26,732.25/77.25
  6. Step 6: Final answer
    x = 346.05

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.