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Finding the Third Proportional to 139,750 and 221,439

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Solution

The third proportional to 139,750 and 221,439 is: 350,878.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,750 : 221,439 = 221,439 : x
  2. Step 2: Convert to fraction form
    139,750/221,439 = 221,439/x
  3. Step 3: Cross multiply
    139,750x = 221,439 × 221,439
  4. Step 4: Simplify right side
    139,750x = 49,035,230,721
  5. Step 5: Solve for x
    x = 49,035,230,721/139,750
  6. Step 6: Final answer
    x = 350,878.22

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.