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Finding the Third Proportional to 77,020 and 165,500

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Solution

The third proportional to 77,020 and 165,500 is: 355,625.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,020 : 165,500 = 165,500 : x
  2. Step 2: Convert to fraction form
    77,020/165,500 = 165,500/x
  3. Step 3: Cross multiply
    77,020x = 165,500 × 165,500
  4. Step 4: Simplify right side
    77,020x = 27,390,250,000
  5. Step 5: Solve for x
    x = 27,390,250,000/77,020
  6. Step 6: Final answer
    x = 355,625.16

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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.