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Finding the Third Proportional to 77,040 and 165,540

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Solution

The third proportional to 77,040 and 165,540 is: 355,704.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,040 : 165,540 = 165,540 : x
  2. Step 2: Convert to fraction form
    77,040/165,540 = 165,540/x
  3. Step 3: Cross multiply
    77,040x = 165,540 × 165,540
  4. Step 4: Simplify right side
    77,040x = 27,403,491,600
  5. Step 5: Solve for x
    x = 27,403,491,600/77,040
  6. Step 6: Final answer
    x = 355,704.72

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.