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Finding the Fourth Proportional to 120,661.93, 166,516.20 and 66,944.95

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Solution

The fourth proportional to 120,661.93, 166,516.20 and 66,944.95 is: 92,385.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,661.93 : 166,516.20 = 66,944.95 : x
  2. Step 2: Convert to fraction form
    120,661.93/166,516.20 = 66,944.95/x
  3. Step 3: Cross multiply
    120,661.93x = 166,516.20 × 66,944.95
  4. Step 4: Simplify right side
    120,661.93x = 11,147,418,683.19
  5. Step 5: Solve for x
    x = 11,147,418,683.19/120,661.93
  6. Step 6: Final answer
    x = 92,385.55

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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.