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Finding the Third Proportional to 78,488 and 171,555

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Solution

The third proportional to 78,488 and 171,555 is: 374,976.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,488 : 171,555 = 171,555 : x
  2. Step 2: Convert to fraction form
    78,488/171,555 = 171,555/x
  3. Step 3: Cross multiply
    78,488x = 171,555 × 171,555
  4. Step 4: Simplify right side
    78,488x = 29,431,118,025
  5. Step 5: Solve for x
    x = 29,431,118,025/78,488
  6. Step 6: Final answer
    x = 374,976.02

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.