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Finding the Fourth Proportional to 120,409.96, 166,158.42 and 66,691.78

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Solution

The fourth proportional to 120,409.96, 166,158.42 and 66,691.78 is: 92,030.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,409.96 : 166,158.42 = 66,691.78 : x
  2. Step 2: Convert to fraction form
    120,409.96/166,158.42 = 66,691.78/x
  3. Step 3: Cross multiply
    120,409.96x = 166,158.42 × 66,691.78
  4. Step 4: Simplify right side
    120,409.96x = 11,081,400,791.79
  5. Step 5: Solve for x
    x = 11,081,400,791.79/120,409.96
  6. Step 6: Final answer
    x = 92,030.60

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1.5x scale

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.