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Finding the Third Proportional to 87,906 and 136,221

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Solution

The third proportional to 87,906 and 136,221 is: 211,090.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,906 : 136,221 = 136,221 : x
  2. Step 2: Convert to fraction form
    87,906/136,221 = 136,221/x
  3. Step 3: Cross multiply
    87,906x = 136,221 × 136,221
  4. Step 4: Simplify right side
    87,906x = 18,556,160,841
  5. Step 5: Solve for x
    x = 18,556,160,841/87,906
  6. Step 6: Final answer
    x = 211,090.95

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.