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Finding the Fourth Proportional to 120,374.82, 166,115.20 and 66,658.68

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Solution

The fourth proportional to 120,374.82, 166,115.20 and 66,658.68 is: 91,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,374.82 : 166,115.20 = 66,658.68 : x
  2. Step 2: Convert to fraction form
    120,374.82/166,115.20 = 66,658.68/x
  3. Step 3: Cross multiply
    120,374.82x = 166,115.20 × 66,658.68
  4. Step 4: Simplify right side
    120,374.82x = 11,073,019,959.94
  5. Step 5: Solve for x
    x = 11,073,019,959.94/120,374.82
  6. Step 6: Final answer
    x = 91,987.84

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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.