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Finding the Third Proportional to 129,456 and 199,944

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Solution

The third proportional to 129,456 and 199,944 is: 308,812.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,456 : 199,944 = 199,944 : x
  2. Step 2: Convert to fraction form
    129,456/199,944 = 199,944/x
  3. Step 3: Cross multiply
    129,456x = 199,944 × 199,944
  4. Step 4: Simplify right side
    129,456x = 39,977,603,136
  5. Step 5: Solve for x
    x = 39,977,603,136/129,456
  6. Step 6: Final answer
    x = 308,812.28

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.