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Finding the Third Proportional to 128,100 and 204,642

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Solution

The third proportional to 128,100 and 204,642 is: 326,919.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,100 : 204,642 = 204,642 : x
  2. Step 2: Convert to fraction form
    128,100/204,642 = 204,642/x
  3. Step 3: Cross multiply
    128,100x = 204,642 × 204,642
  4. Step 4: Simplify right side
    128,100x = 41,878,348,164
  5. Step 5: Solve for x
    x = 41,878,348,164/128,100
  6. Step 6: Final answer
    x = 326,919.19

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.