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Finding the Third Proportional to 138,903.75 and 207,441

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Solution

The third proportional to 138,903.75 and 207,441 is: 309,795.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,903.75 : 207,441 = 207,441 : x
  2. Step 2: Convert to fraction form
    138,903.75/207,441 = 207,441/x
  3. Step 3: Cross multiply
    138,903.75x = 207,441 × 207,441
  4. Step 4: Simplify right side
    138,903.75x = 43,031,768,481
  5. Step 5: Solve for x
    x = 43,031,768,481/138,903.75
  6. Step 6: Final answer
    x = 309,795.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.