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Finding the Fourth Proportional to 117,515.80, 176,200.80 and 67,571.20

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Solution

The fourth proportional to 117,515.80, 176,200.80 and 67,571.20 is: 101,314.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,515.80 : 176,200.80 = 67,571.20 : x
  2. Step 2: Convert to fraction form
    117,515.80/176,200.80 = 67,571.20/x
  3. Step 3: Cross multiply
    117,515.80x = 176,200.80 × 67,571.20
  4. Step 4: Simplify right side
    117,515.80x = 11,906,099,496.96
  5. Step 5: Solve for x
    x = 11,906,099,496.96/117,515.80
  6. Step 6: Final answer
    x = 101,314.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.