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Finding the Third Proportional to 66,828 and 139,167

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Solution

The third proportional to 66,828 and 139,167 is: 289,810.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,828 : 139,167 = 139,167 : x
  2. Step 2: Convert to fraction form
    66,828/139,167 = 139,167/x
  3. Step 3: Cross multiply
    66,828x = 139,167 × 139,167
  4. Step 4: Simplify right side
    66,828x = 19,367,453,889
  5. Step 5: Solve for x
    x = 19,367,453,889/66,828
  6. Step 6: Final answer
    x = 289,810.47

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.