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Finding the Fourth Proportional to 120,408.40, 166,163.59 and 66,696.89

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Solution

The fourth proportional to 120,408.40, 166,163.59 and 66,696.89 is: 92,041.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,408.40 : 166,163.59 = 66,696.89 : x
  2. Step 2: Convert to fraction form
    120,408.40/166,163.59 = 66,696.89/x
  3. Step 3: Cross multiply
    120,408.40x = 166,163.59 × 66,696.89
  4. Step 4: Simplify right side
    120,408.40x = 11,082,595,245.00
  5. Step 5: Solve for x
    x = 11,082,595,245.00/120,408.40
  6. Step 6: Final answer
    x = 92,041.71

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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.