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Finding the Third Proportional to 84,103.50 and 128,616.75

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Solution

The third proportional to 84,103.50 and 128,616.75 is: 196,689.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,103.50 : 128,616.75 = 128,616.75 : x
  2. Step 2: Convert to fraction form
    84,103.50/128,616.75 = 128,616.75/x
  3. Step 3: Cross multiply
    84,103.50x = 128,616.75 × 128,616.75
  4. Step 4: Simplify right side
    84,103.50x = 16,542,268,380.56
  5. Step 5: Solve for x
    x = 16,542,268,380.56/84,103.50
  6. Step 6: Final answer
    x = 196,689.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.