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Finding the Third Proportional to 139,816.13 and 209,371.50

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Solution

The third proportional to 139,816.13 and 209,371.50 is: 313,529.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,816.13 : 209,371.50 = 209,371.50 : x
  2. Step 2: Convert to fraction form
    139,816.13/209,371.50 = 209,371.50/x
  3. Step 3: Cross multiply
    139,816.13x = 209,371.50 × 209,371.50
  4. Step 4: Simplify right side
    139,816.13x = 43,836,425,012.25
  5. Step 5: Solve for x
    x = 43,836,425,012.25/139,816.13
  6. Step 6: Final answer
    x = 313,529.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.