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Finding the Third Proportional to 138,905.50 and 207,443.75

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Solution

The third proportional to 138,905.50 and 207,443.75 is: 309,799.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,905.50 : 207,443.75 = 207,443.75 : x
  2. Step 2: Convert to fraction form
    138,905.50/207,443.75 = 207,443.75/x
  3. Step 3: Cross multiply
    138,905.50x = 207,443.75 × 207,443.75
  4. Step 4: Simplify right side
    138,905.50x = 43,032,909,414.06
  5. Step 5: Solve for x
    x = 43,032,909,414.06/138,905.50
  6. Step 6: Final answer
    x = 309,799.90

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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.