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Finding the Third Proportional to 172,198.50 and 258,955.50

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Solution

The third proportional to 172,198.50 and 258,955.50 is: 389,422.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,198.50 : 258,955.50 = 258,955.50 : x
  2. Step 2: Convert to fraction form
    172,198.50/258,955.50 = 258,955.50/x
  3. Step 3: Cross multiply
    172,198.50x = 258,955.50 × 258,955.50
  4. Step 4: Simplify right side
    172,198.50x = 67,057,950,980.25
  5. Step 5: Solve for x
    x = 67,057,950,980.25/172,198.50
  6. Step 6: Final answer
    x = 389,422.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.