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Finding the Third Proportional to 83,455 and 128,098

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Solution

The third proportional to 83,455 and 128,098 is: 196,622.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,455 : 128,098 = 128,098 : x
  2. Step 2: Convert to fraction form
    83,455/128,098 = 128,098/x
  3. Step 3: Cross multiply
    83,455x = 128,098 × 128,098
  4. Step 4: Simplify right side
    83,455x = 16,409,097,604
  5. Step 5: Solve for x
    x = 16,409,097,604/83,455
  6. Step 6: Final answer
    x = 196,622.10

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.