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Finding the Third Proportional to 40,288 and 87,272

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Solution

The third proportional to 40,288 and 87,272 is: 189,048.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,288 : 87,272 = 87,272 : x
  2. Step 2: Convert to fraction form
    40,288/87,272 = 87,272/x
  3. Step 3: Cross multiply
    40,288x = 87,272 × 87,272
  4. Step 4: Simplify right side
    40,288x = 7,616,401,984
  5. Step 5: Solve for x
    x = 7,616,401,984/40,288
  6. Step 6: Final answer
    x = 189,048.90

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.