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Finding the Third Proportional to 78,915 and 110,997

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Solution

The third proportional to 78,915 and 110,997 is: 156,121.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,915 : 110,997 = 110,997 : x
  2. Step 2: Convert to fraction form
    78,915/110,997 = 110,997/x
  3. Step 3: Cross multiply
    78,915x = 110,997 × 110,997
  4. Step 4: Simplify right side
    78,915x = 12,320,334,009
  5. Step 5: Solve for x
    x = 12,320,334,009/78,915
  6. Step 6: Final answer
    x = 156,121.57

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.