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Finding the Third Proportional to 82,020 and 128,497

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Solution

The third proportional to 82,020 and 128,497 is: 201,310.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,020 : 128,497 = 128,497 : x
  2. Step 2: Convert to fraction form
    82,020/128,497 = 128,497/x
  3. Step 3: Cross multiply
    82,020x = 128,497 × 128,497
  4. Step 4: Simplify right side
    82,020x = 16,511,479,009
  5. Step 5: Solve for x
    x = 16,511,479,009/82,020
  6. Step 6: Final answer
    x = 201,310.40

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.