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Finding the Third Proportional to 121,838 and 191,172

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Solution

The third proportional to 121,838 and 191,172 is: 299,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,838 : 191,172 = 191,172 : x
  2. Step 2: Convert to fraction form
    121,838/191,172 = 191,172/x
  3. Step 3: Cross multiply
    121,838x = 191,172 × 191,172
  4. Step 4: Simplify right side
    121,838x = 36,546,733,584
  5. Step 5: Solve for x
    x = 36,546,733,584/121,838
  6. Step 6: Final answer
    x = 299,961.70

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.