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Finding the Third Proportional to 87,553 and 128,223

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Solution

The third proportional to 87,553 and 128,223 is: 187,784.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,553 : 128,223 = 128,223 : x
  2. Step 2: Convert to fraction form
    87,553/128,223 = 128,223/x
  3. Step 3: Cross multiply
    87,553x = 128,223 × 128,223
  4. Step 4: Simplify right side
    87,553x = 16,441,137,729
  5. Step 5: Solve for x
    x = 16,441,137,729/87,553
  6. Step 6: Final answer
    x = 187,784.97

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.