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Finding the Fourth Proportional to 123,190.50, 170,002.89 and 66,601.88

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Solution

The fourth proportional to 123,190.50, 170,002.89 and 66,601.88 is: 91,910.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,190.50 : 170,002.89 = 66,601.88 : x
  2. Step 2: Convert to fraction form
    123,190.50/170,002.89 = 66,601.88/x
  3. Step 3: Cross multiply
    123,190.50x = 170,002.89 × 66,601.88
  4. Step 4: Simplify right side
    123,190.50x = 11,322,512,079.43
  5. Step 5: Solve for x
    x = 11,322,512,079.43/123,190.50
  6. Step 6: Final answer
    x = 91,910.59

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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.