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Finding the Third Proportional to 75,640 and 165,129

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Solution

The third proportional to 75,640 and 165,129 is: 360,491.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,640 : 165,129 = 165,129 : x
  2. Step 2: Convert to fraction form
    75,640/165,129 = 165,129/x
  3. Step 3: Cross multiply
    75,640x = 165,129 × 165,129
  4. Step 4: Simplify right side
    75,640x = 27,267,586,641
  5. Step 5: Solve for x
    x = 27,267,586,641/75,640
  6. Step 6: Final answer
    x = 360,491.63

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.