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Finding the Third Proportional to 128,779.75 and 196,997.25

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Solution

The third proportional to 128,779.75 and 196,997.25 is: 301,351.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,779.75 : 196,997.25 = 196,997.25 : x
  2. Step 2: Convert to fraction form
    128,779.75/196,997.25 = 196,997.25/x
  3. Step 3: Cross multiply
    128,779.75x = 196,997.25 × 196,997.25
  4. Step 4: Simplify right side
    128,779.75x = 38,807,916,507.56
  5. Step 5: Solve for x
    x = 38,807,916,507.56/128,779.75
  6. Step 6: Final answer
    x = 301,351.08

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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.