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Finding the Fourth Proportional to 123,229.56, 170,056.80 and 66,640.92

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Solution

The fourth proportional to 123,229.56, 170,056.80 and 66,640.92 is: 91,964.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,229.56 : 170,056.80 = 66,640.92 : x
  2. Step 2: Convert to fraction form
    123,229.56/170,056.80 = 66,640.92/x
  3. Step 3: Cross multiply
    123,229.56x = 170,056.80 × 66,640.92
  4. Step 4: Simplify right side
    123,229.56x = 11,332,741,604.26
  5. Step 5: Solve for x
    x = 11,332,741,604.26/123,229.56
  6. Step 6: Final answer
    x = 91,964.47

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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.