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Finding the Third Proportional to 38,976 and 85,728

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Solution

The third proportional to 38,976 and 85,728 is: 188,559.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,976 : 85,728 = 85,728 : x
  2. Step 2: Convert to fraction form
    38,976/85,728 = 85,728/x
  3. Step 3: Cross multiply
    38,976x = 85,728 × 85,728
  4. Step 4: Simplify right side
    38,976x = 7,349,289,984
  5. Step 5: Solve for x
    x = 7,349,289,984/38,976
  6. Step 6: Final answer
    x = 188,559.37

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.