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Finding the Third Proportional to 84,576 and 126,603

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Solution

The third proportional to 84,576 and 126,603 is: 189,513.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,576 : 126,603 = 126,603 : x
  2. Step 2: Convert to fraction form
    84,576/126,603 = 126,603/x
  3. Step 3: Cross multiply
    84,576x = 126,603 × 126,603
  4. Step 4: Simplify right side
    84,576x = 16,028,319,609
  5. Step 5: Solve for x
    x = 16,028,319,609/84,576
  6. Step 6: Final answer
    x = 189,513.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.