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Finding the Third Proportional to 138,813.75 and 298,685.25

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Solution

The third proportional to 138,813.75 and 298,685.25 is: 642,680.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,813.75 : 298,685.25 = 298,685.25 : x
  2. Step 2: Convert to fraction form
    138,813.75/298,685.25 = 298,685.25/x
  3. Step 3: Cross multiply
    138,813.75x = 298,685.25 × 298,685.25
  4. Step 4: Simplify right side
    138,813.75x = 89,212,878,567.56
  5. Step 5: Solve for x
    x = 89,212,878,567.56/138,813.75
  6. Step 6: Final answer
    x = 642,680.42

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.