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Finding the Third Proportional to 129,000 and 199,251

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Solution

The third proportional to 129,000 and 199,251 is: 307,759.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,000 : 199,251 = 199,251 : x
  2. Step 2: Convert to fraction form
    129,000/199,251 = 199,251/x
  3. Step 3: Cross multiply
    129,000x = 199,251 × 199,251
  4. Step 4: Simplify right side
    129,000x = 39,700,961,001
  5. Step 5: Solve for x
    x = 39,700,961,001/129,000
  6. Step 6: Final answer
    x = 307,759.39

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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.