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Finding the Third Proportional to 38,178 and 78,756

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Solution

The third proportional to 38,178 and 78,756 is: 162,462.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,178 : 78,756 = 78,756 : x
  2. Step 2: Convert to fraction form
    38,178/78,756 = 78,756/x
  3. Step 3: Cross multiply
    38,178x = 78,756 × 78,756
  4. Step 4: Simplify right side
    38,178x = 6,202,507,536
  5. Step 5: Solve for x
    x = 6,202,507,536/38,178
  6. Step 6: Final answer
    x = 162,462.87

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.