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Finding the Third Proportional to 138,321.75 and 212,707.50

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Solution

The third proportional to 138,321.75 and 212,707.50 is: 327,095.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,321.75 : 212,707.50 = 212,707.50 : x
  2. Step 2: Convert to fraction form
    138,321.75/212,707.50 = 212,707.50/x
  3. Step 3: Cross multiply
    138,321.75x = 212,707.50 × 212,707.50
  4. Step 4: Simplify right side
    138,321.75x = 45,244,480,556.25
  5. Step 5: Solve for x
    x = 45,244,480,556.25/138,321.75
  6. Step 6: Final answer
    x = 327,095.92

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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.