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Finding the Third Proportional to 74,918 and 170,621

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Solution

The third proportional to 74,918 and 170,621 is: 388,578.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,918 : 170,621 = 170,621 : x
  2. Step 2: Convert to fraction form
    74,918/170,621 = 170,621/x
  3. Step 3: Cross multiply
    74,918x = 170,621 × 170,621
  4. Step 4: Simplify right side
    74,918x = 29,111,525,641
  5. Step 5: Solve for x
    x = 29,111,525,641/74,918
  6. Step 6: Final answer
    x = 388,578.52

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Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.