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Finding the Third Proportional to 85,619 and 136,731

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Solution

The third proportional to 85,619 and 136,731 is: 218,355.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,619 : 136,731 = 136,731 : x
  2. Step 2: Convert to fraction form
    85,619/136,731 = 136,731/x
  3. Step 3: Cross multiply
    85,619x = 136,731 × 136,731
  4. Step 4: Simplify right side
    85,619x = 18,695,366,361
  5. Step 5: Solve for x
    x = 18,695,366,361/85,619
  6. Step 6: Final answer
    x = 218,355.35

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.