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Finding the Third Proportional to 138,903.38 and 210,291.56

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Solution

The third proportional to 138,903.38 and 210,291.56 is: 318,369.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,903.38 : 210,291.56 = 210,291.56 : x
  2. Step 2: Convert to fraction form
    138,903.38/210,291.56 = 210,291.56/x
  3. Step 3: Cross multiply
    138,903.38x = 210,291.56 × 210,291.56
  4. Step 4: Simplify right side
    138,903.38x = 44,222,541,258.69
  5. Step 5: Solve for x
    x = 44,222,541,258.69/138,903.38
  6. Step 6: Final answer
    x = 318,369.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.