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Finding the Third Proportional to 121,000 and 158,172

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Solution

The third proportional to 121,000 and 158,172 is: 206,763.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,000 : 158,172 = 158,172 : x
  2. Step 2: Convert to fraction form
    121,000/158,172 = 158,172/x
  3. Step 3: Cross multiply
    121,000x = 158,172 × 158,172
  4. Step 4: Simplify right side
    121,000x = 25,018,381,584
  5. Step 5: Solve for x
    x = 25,018,381,584/121,000
  6. Step 6: Final answer
    x = 206,763.48

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.