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Finding the Fourth Proportional to 121,692.12, 167,934.41 and 67,976.97

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Solution

The fourth proportional to 121,692.12, 167,934.41 and 67,976.97 is: 93,807.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,692.12 : 167,934.41 = 67,976.97 : x
  2. Step 2: Convert to fraction form
    121,692.12/167,934.41 = 67,976.97/x
  3. Step 3: Cross multiply
    121,692.12x = 167,934.41 × 67,976.97
  4. Step 4: Simplify right side
    121,692.12x = 11,415,672,350.54
  5. Step 5: Solve for x
    x = 11,415,672,350.54/121,692.12
  6. Step 6: Final answer
    x = 93,807.82

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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.