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Finding the Third Proportional to 138,319.50 and 213,619.50

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Solution

The third proportional to 138,319.50 and 213,619.50 is: 329,912.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,319.50 : 213,619.50 = 213,619.50 : x
  2. Step 2: Convert to fraction form
    138,319.50/213,619.50 = 213,619.50/x
  3. Step 3: Cross multiply
    138,319.50x = 213,619.50 × 213,619.50
  4. Step 4: Simplify right side
    138,319.50x = 45,633,290,780.25
  5. Step 5: Solve for x
    x = 45,633,290,780.25/138,319.50
  6. Step 6: Final answer
    x = 329,912.20

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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.