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Finding the Fourth Proportional to 123,229.20, 170,056.20 and 66,640.80

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Solution

The fourth proportional to 123,229.20, 170,056.20 and 66,640.80 is: 91,964.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,229.20 : 170,056.20 = 66,640.80 : x
  2. Step 2: Convert to fraction form
    123,229.20/170,056.20 = 66,640.80/x
  3. Step 3: Cross multiply
    123,229.20x = 170,056.20 × 66,640.80
  4. Step 4: Simplify right side
    123,229.20x = 11,332,681,212.96
  5. Step 5: Solve for x
    x = 11,332,681,212.96/123,229.20
  6. Step 6: Final answer
    x = 91,964.25

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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.