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Finding the Fourth Proportional to 121,147.88, 167,181.64 and 75,850.84

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Solution

The fourth proportional to 121,147.88, 167,181.64 and 75,850.84 is: 104,672.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,147.88 : 167,181.64 = 75,850.84 : x
  2. Step 2: Convert to fraction form
    121,147.88/167,181.64 = 75,850.84/x
  3. Step 3: Cross multiply
    121,147.88x = 167,181.64 × 75,850.84
  4. Step 4: Simplify right side
    121,147.88x = 12,680,867,826.58
  5. Step 5: Solve for x
    x = 12,680,867,826.58/121,147.88
  6. Step 6: Final answer
    x = 104,672.64

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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.