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Finding the Third Proportional to 139,240 and 212,124

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Solution

The third proportional to 139,240 and 212,124 is: 323,158.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,240 : 212,124 = 212,124 : x
  2. Step 2: Convert to fraction form
    139,240/212,124 = 212,124/x
  3. Step 3: Cross multiply
    139,240x = 212,124 × 212,124
  4. Step 4: Simplify right side
    139,240x = 44,996,591,376
  5. Step 5: Solve for x
    x = 44,996,591,376/139,240
  6. Step 6: Final answer
    x = 323,158.51

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.