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Finding the Third Proportional to 128,184.75 and 198,996.75

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Solution

The third proportional to 128,184.75 and 198,996.75 is: 308,926.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,184.75 : 198,996.75 = 198,996.75 : x
  2. Step 2: Convert to fraction form
    128,184.75/198,996.75 = 198,996.75/x
  3. Step 3: Cross multiply
    128,184.75x = 198,996.75 × 198,996.75
  4. Step 4: Simplify right side
    128,184.75x = 39,599,706,510.56
  5. Step 5: Solve for x
    x = 39,599,706,510.56/128,184.75
  6. Step 6: Final answer
    x = 308,926.81

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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.