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Finding the Third Proportional to 139,539.75 and 305,676

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Solution

The third proportional to 139,539.75 and 305,676 is: 669,614.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,539.75 : 305,676 = 305,676 : x
  2. Step 2: Convert to fraction form
    139,539.75/305,676 = 305,676/x
  3. Step 3: Cross multiply
    139,539.75x = 305,676 × 305,676
  4. Step 4: Simplify right side
    139,539.75x = 93,437,816,976
  5. Step 5: Solve for x
    x = 93,437,816,976/139,539.75
  6. Step 6: Final answer
    x = 669,614.34

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.