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Finding the Third Proportional to 72.94 and 87.38

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Solution

The third proportional to 72.94 and 87.38 is: 104.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.94 : 87.38 = 87.38 : x
  2. Step 2: Convert to fraction form
    72.94/87.38 = 87.38/x
  3. Step 3: Cross multiply
    72.94x = 87.38 × 87.38
  4. Step 4: Simplify right side
    72.94x = 7,634.39
  5. Step 5: Solve for x
    x = 7,634.39/72.94
  6. Step 6: Final answer
    x = 104.67

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.