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Finding the Third Proportional to 47.81 and 102.94

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Solution

The third proportional to 47.81 and 102.94 is: 221.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.81 : 102.94 = 102.94 : x
  2. Step 2: Convert to fraction form
    47.81/102.94 = 102.94/x
  3. Step 3: Cross multiply
    47.81x = 102.94 × 102.94
  4. Step 4: Simplify right side
    47.81x = 10,596.13
  5. Step 5: Solve for x
    x = 10,596.13/47.81
  6. Step 6: Final answer
    x = 221.62

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.