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Finding the Third Proportional to 55,741 and 87,311

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Solution

The third proportional to 55,741 and 87,311 is: 136,761.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,741 : 87,311 = 87,311 : x
  2. Step 2: Convert to fraction form
    55,741/87,311 = 87,311/x
  3. Step 3: Cross multiply
    55,741x = 87,311 × 87,311
  4. Step 4: Simplify right side
    55,741x = 7,623,210,721
  5. Step 5: Solve for x
    x = 7,623,210,721/55,741
  6. Step 6: Final answer
    x = 136,761.28

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.