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Finding the Third Proportional to 77.25 and 110.63

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Solution

The third proportional to 77.25 and 110.63 is: 158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.25 : 110.63 = 110.63 : x
  2. Step 2: Convert to fraction form
    77.25/110.63 = 110.63/x
  3. Step 3: Cross multiply
    77.25x = 110.63 × 110.63
  4. Step 4: Simplify right side
    77.25x = 12,237.89
  5. Step 5: Solve for x
    x = 12,237.89/77.25
  6. Step 6: Final answer
    x = 158.42

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.