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Finding the Third Proportional to 136,491 and 209,085

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Solution

The third proportional to 136,491 and 209,085 is: 320,288.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,491 : 209,085 = 209,085 : x
  2. Step 2: Convert to fraction form
    136,491/209,085 = 209,085/x
  3. Step 3: Cross multiply
    136,491x = 209,085 × 209,085
  4. Step 4: Simplify right side
    136,491x = 43,716,537,225
  5. Step 5: Solve for x
    x = 43,716,537,225/136,491
  6. Step 6: Final answer
    x = 320,288.79

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.