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Finding the Third Proportional to 46.78 and 81.94

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Solution

The third proportional to 46.78 and 81.94 is: 143.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.78 : 81.94 = 81.94 : x
  2. Step 2: Convert to fraction form
    46.78/81.94 = 81.94/x
  3. Step 3: Cross multiply
    46.78x = 81.94 × 81.94
  4. Step 4: Simplify right side
    46.78x = 6,713.75
  5. Step 5: Solve for x
    x = 6,713.75/46.78
  6. Step 6: Final answer
    x = 143.51

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.