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Finding the Fourth Proportional to 120,799.28, 166,703.28 and 67,084.31

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Solution

The fourth proportional to 120,799.28, 166,703.28 and 67,084.31 is: 92,576.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,799.28 : 166,703.28 = 67,084.31 : x
  2. Step 2: Convert to fraction form
    120,799.28/166,703.28 = 67,084.31/x
  3. Step 3: Cross multiply
    120,799.28x = 166,703.28 × 67,084.31
  4. Step 4: Simplify right side
    120,799.28x = 11,183,173,680.02
  5. Step 5: Solve for x
    x = 11,183,173,680.02/120,799.28
  6. Step 6: Final answer
    x = 92,576.50

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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.