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Finding the Third Proportional to 87,550 and 128,219

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Solution

The third proportional to 87,550 and 128,219 is: 187,779.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,550 : 128,219 = 128,219 : x
  2. Step 2: Convert to fraction form
    87,550/128,219 = 128,219/x
  3. Step 3: Cross multiply
    87,550x = 128,219 × 128,219
  4. Step 4: Simplify right side
    87,550x = 16,440,111,961
  5. Step 5: Solve for x
    x = 16,440,111,961/87,550
  6. Step 6: Final answer
    x = 187,779.69

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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.