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Finding the Fourth Proportional to 120,694.52, 166,558.52 and 66,979.57

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Solution

The fourth proportional to 120,694.52, 166,558.52 and 66,979.57 is: 92,431.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,694.52 : 166,558.52 = 66,979.57 : x
  2. Step 2: Convert to fraction form
    120,694.52/166,558.52 = 66,979.57/x
  3. Step 3: Cross multiply
    120,694.52x = 166,558.52 × 66,979.57
  4. Step 4: Simplify right side
    120,694.52x = 11,156,017,800.49
  5. Step 5: Solve for x
    x = 11,156,017,800.49/120,694.52
  6. Step 6: Final answer
    x = 92,431.85

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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.