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Finding the Third Proportional to 139,056.75 and 299,436.75

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Solution

The third proportional to 139,056.75 and 299,436.75 is: 644,789.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,056.75 : 299,436.75 = 299,436.75 : x
  2. Step 2: Convert to fraction form
    139,056.75/299,436.75 = 299,436.75/x
  3. Step 3: Cross multiply
    139,056.75x = 299,436.75 × 299,436.75
  4. Step 4: Simplify right side
    139,056.75x = 89,662,367,250.56
  5. Step 5: Solve for x
    x = 89,662,367,250.56/139,056.75
  6. Step 6: Final answer
    x = 644,789.75

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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.