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Finding the Fourth Proportional to 123,847.46, 170,912.85 and 72,863.54

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Solution

The fourth proportional to 123,847.46, 170,912.85 and 72,863.54 is: 100,553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,847.46 : 170,912.85 = 72,863.54 : x
  2. Step 2: Convert to fraction form
    123,847.46/170,912.85 = 72,863.54/x
  3. Step 3: Cross multiply
    123,847.46x = 170,912.85 × 72,863.54
  4. Step 4: Simplify right side
    123,847.46x = 12,453,315,282.49
  5. Step 5: Solve for x
    x = 12,453,315,282.49/123,847.46
  6. Step 6: Final answer
    x = 100,553.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.