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Finding the Fourth Proportional to 120,644.52, 166,489.86 and 66,930.60

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Solution

The fourth proportional to 120,644.52, 166,489.86 and 66,930.60 is: 92,364.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,644.52 : 166,489.86 = 66,930.60 : x
  2. Step 2: Convert to fraction form
    120,644.52/166,489.86 = 66,930.60/x
  3. Step 3: Cross multiply
    120,644.52x = 166,489.86 × 66,930.60
  4. Step 4: Simplify right side
    120,644.52x = 11,143,266,223.72
  5. Step 5: Solve for x
    x = 11,143,266,223.72/120,644.52
  6. Step 6: Final answer
    x = 92,364.46

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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.