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Finding the Fourth Proportional to 120,930.32, 166,885.32 and 67,221.20

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Solution

The fourth proportional to 120,930.32, 166,885.32 and 67,221.20 is: 92,766.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,930.32 : 166,885.32 = 67,221.20 : x
  2. Step 2: Convert to fraction form
    120,930.32/166,885.32 = 67,221.20/x
  3. Step 3: Cross multiply
    120,930.32x = 166,885.32 × 67,221.20
  4. Step 4: Simplify right side
    120,930.32x = 11,218,231,472.78
  5. Step 5: Solve for x
    x = 11,218,231,472.78/120,930.32
  6. Step 6: Final answer
    x = 92,766.08

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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.