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Finding the Fourth Proportional to 120,699.88, 166,640.97 and 113,168.50

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Solution

The fourth proportional to 120,699.88, 166,640.97 and 113,168.50 is: 156,242.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,699.88 : 166,640.97 = 113,168.50 : x
  2. Step 2: Convert to fraction form
    120,699.88/166,640.97 = 113,168.50/x
  3. Step 3: Cross multiply
    120,699.88x = 166,640.97 × 113,168.50
  4. Step 4: Simplify right side
    120,699.88x = 18,858,508,613.45
  5. Step 5: Solve for x
    x = 18,858,508,613.45/120,699.88
  6. Step 6: Final answer
    x = 156,242.98

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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.