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Finding the Third Proportional to 77,658 and 168,009

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Solution

The third proportional to 77,658 and 168,009 is: 363,478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,658 : 168,009 = 168,009 : x
  2. Step 2: Convert to fraction form
    77,658/168,009 = 168,009/x
  3. Step 3: Cross multiply
    77,658x = 168,009 × 168,009
  4. Step 4: Simplify right side
    77,658x = 28,227,024,081
  5. Step 5: Solve for x
    x = 28,227,024,081/77,658
  6. Step 6: Final answer
    x = 363,478.64

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.