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Finding the Third Proportional to 57,780 and 126,132

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Solution

The third proportional to 57,780 and 126,132 is: 275,342.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,780 : 126,132 = 126,132 : x
  2. Step 2: Convert to fraction form
    57,780/126,132 = 126,132/x
  3. Step 3: Cross multiply
    57,780x = 126,132 × 126,132
  4. Step 4: Simplify right side
    57,780x = 15,909,281,424
  5. Step 5: Solve for x
    x = 15,909,281,424/57,780
  6. Step 6: Final answer
    x = 275,342.36

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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.