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Finding the Third Proportional to 63,639 and 90,474.75

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Solution

The third proportional to 63,639 and 90,474.75 is: 128,626.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,639 : 90,474.75 = 90,474.75 : x
  2. Step 2: Convert to fraction form
    63,639/90,474.75 = 90,474.75/x
  3. Step 3: Cross multiply
    63,639x = 90,474.75 × 90,474.75
  4. Step 4: Simplify right side
    63,639x = 8,185,680,387.56
  5. Step 5: Solve for x
    x = 8,185,680,387.56/63,639
  6. Step 6: Final answer
    x = 128,626.79

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.