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Finding the Third Proportional to 85,728 and 132,728

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Solution

The third proportional to 85,728 and 132,728 is: 205,495.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,728 : 132,728 = 132,728 : x
  2. Step 2: Convert to fraction form
    85,728/132,728 = 132,728/x
  3. Step 3: Cross multiply
    85,728x = 132,728 × 132,728
  4. Step 4: Simplify right side
    85,728x = 17,616,721,984
  5. Step 5: Solve for x
    x = 17,616,721,984/85,728
  6. Step 6: Final answer
    x = 205,495.54

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.