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Finding the Third Proportional to 136,416 and 208,992

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Solution

The third proportional to 136,416 and 208,992 is: 320,179.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,416 : 208,992 = 208,992 : x
  2. Step 2: Convert to fraction form
    136,416/208,992 = 208,992/x
  3. Step 3: Cross multiply
    136,416x = 208,992 × 208,992
  4. Step 4: Simplify right side
    136,416x = 43,677,656,064
  5. Step 5: Solve for x
    x = 43,677,656,064/136,416
  6. Step 6: Final answer
    x = 320,179.86

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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.