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Finding the Third Proportional to 131,718 and 212,121

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Solution

The third proportional to 131,718 and 212,121 is: 341,603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,718 : 212,121 = 212,121 : x
  2. Step 2: Convert to fraction form
    131,718/212,121 = 212,121/x
  3. Step 3: Cross multiply
    131,718x = 212,121 × 212,121
  4. Step 4: Simplify right side
    131,718x = 44,995,318,641
  5. Step 5: Solve for x
    x = 44,995,318,641/131,718
  6. Step 6: Final answer
    x = 341,603.42

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.