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Finding the Fourth Proportional to 120,847.60, 166,766.07 and 66,399.67

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Solution

The fourth proportional to 120,847.60, 166,766.07 and 66,399.67 is: 91,629.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,847.60 : 166,766.07 = 66,399.67 : x
  2. Step 2: Convert to fraction form
    120,847.60/166,766.07 = 66,399.67/x
  3. Step 3: Cross multiply
    120,847.60x = 166,766.07 × 66,399.67
  4. Step 4: Simplify right side
    120,847.60x = 11,073,212,015.20
  5. Step 5: Solve for x
    x = 11,073,212,015.20/120,847.60
  6. Step 6: Final answer
    x = 91,629.56

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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.