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Finding the Fourth Proportional to 120,871.56, 166,805.66 and 67,158.84

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Solution

The fourth proportional to 120,871.56, 166,805.66 and 67,158.84 is: 92,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,871.56 : 166,805.66 = 67,158.84 : x
  2. Step 2: Convert to fraction form
    120,871.56/166,805.66 = 67,158.84/x
  3. Step 3: Cross multiply
    120,871.56x = 166,805.66 × 67,158.84
  4. Step 4: Simplify right side
    120,871.56x = 11,202,474,631.03
  5. Step 5: Solve for x
    x = 11,202,474,631.03/120,871.56
  6. Step 6: Final answer
    x = 92,680.81

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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.