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Finding the Third Proportional to 79,724 and 122,646

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Solution

The third proportional to 79,724 and 122,646 is: 188,676.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,724 : 122,646 = 122,646 : x
  2. Step 2: Convert to fraction form
    79,724/122,646 = 122,646/x
  3. Step 3: Cross multiply
    79,724x = 122,646 × 122,646
  4. Step 4: Simplify right side
    79,724x = 15,042,041,316
  5. Step 5: Solve for x
    x = 15,042,041,316/79,724
  6. Step 6: Final answer
    x = 188,676.45

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.