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Finding the Third Proportional to 129,021 and 199,363.50

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Solution

The third proportional to 129,021 and 199,363.50 is: 308,056.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,021 : 199,363.50 = 199,363.50 : x
  2. Step 2: Convert to fraction form
    129,021/199,363.50 = 199,363.50/x
  3. Step 3: Cross multiply
    129,021x = 199,363.50 × 199,363.50
  4. Step 4: Simplify right side
    129,021x = 39,745,805,132.25
  5. Step 5: Solve for x
    x = 39,745,805,132.25/129,021
  6. Step 6: Final answer
    x = 308,056.87

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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.