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Finding the Third Proportional to 68,178 and 105,811

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Solution

The third proportional to 68,178 and 105,811 is: 164,216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,178 : 105,811 = 105,811 : x
  2. Step 2: Convert to fraction form
    68,178/105,811 = 105,811/x
  3. Step 3: Cross multiply
    68,178x = 105,811 × 105,811
  4. Step 4: Simplify right side
    68,178x = 11,195,967,721
  5. Step 5: Solve for x
    x = 11,195,967,721/68,178
  6. Step 6: Final answer
    x = 164,216.72

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.