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Finding the Third Proportional to 36,129 and 77,239.50

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Solution

The third proportional to 36,129 and 77,239.50 is: 165,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,129 : 77,239.50 = 77,239.50 : x
  2. Step 2: Convert to fraction form
    36,129/77,239.50 = 77,239.50/x
  3. Step 3: Cross multiply
    36,129x = 77,239.50 × 77,239.50
  4. Step 4: Simplify right side
    36,129x = 5,965,940,360.25
  5. Step 5: Solve for x
    x = 5,965,940,360.25/36,129
  6. Step 6: Final answer
    x = 165,128.85

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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.