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Finding the Third Proportional to 31,178 and 66,734

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Solution

The third proportional to 31,178 and 66,734 is: 142,838.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,178 : 66,734 = 66,734 : x
  2. Step 2: Convert to fraction form
    31,178/66,734 = 66,734/x
  3. Step 3: Cross multiply
    31,178x = 66,734 × 66,734
  4. Step 4: Simplify right side
    31,178x = 4,453,426,756
  5. Step 5: Solve for x
    x = 4,453,426,756/31,178
  6. Step 6: Final answer
    x = 142,838.76

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.