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Finding the Third Proportional to 57,128 and 81,196

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Solution

The third proportional to 57,128 and 81,196 is: 115,403.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128 : 81,196 = 81,196 : x
  2. Step 2: Convert to fraction form
    57,128/81,196 = 81,196/x
  3. Step 3: Cross multiply
    57,128x = 81,196 × 81,196
  4. Step 4: Simplify right side
    57,128x = 6,592,790,416
  5. Step 5: Solve for x
    x = 6,592,790,416/57,128
  6. Step 6: Final answer
    x = 115,403.84

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.