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Finding the Third Proportional to 129,660 and 189,819

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Solution

The third proportional to 129,660 and 189,819 is: 277,890.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,660 : 189,819 = 189,819 : x
  2. Step 2: Convert to fraction form
    129,660/189,819 = 189,819/x
  3. Step 3: Cross multiply
    129,660x = 189,819 × 189,819
  4. Step 4: Simplify right side
    129,660x = 36,031,252,761
  5. Step 5: Solve for x
    x = 36,031,252,761/129,660
  6. Step 6: Final answer
    x = 277,890.27

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.