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Finding the Third Proportional to 76,620 and 164,904

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Solution

The third proportional to 76,620 and 164,904 is: 354,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,620 : 164,904 = 164,904 : x
  2. Step 2: Convert to fraction form
    76,620/164,904 = 164,904/x
  3. Step 3: Cross multiply
    76,620x = 164,904 × 164,904
  4. Step 4: Simplify right side
    76,620x = 27,193,329,216
  5. Step 5: Solve for x
    x = 27,193,329,216/76,620
  6. Step 6: Final answer
    x = 354,911.63

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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.