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Finding the Fourth Proportional to 120,981, 166,945.88 and 67,264.04

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Solution

The fourth proportional to 120,981, 166,945.88 and 67,264.04 is: 92,819.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,981 : 166,945.88 = 67,264.04 : x
  2. Step 2: Convert to fraction form
    120,981/166,945.88 = 67,264.04/x
  3. Step 3: Cross multiply
    120,981x = 166,945.88 × 67,264.04
  4. Step 4: Simplify right side
    120,981x = 11,229,453,179.11
  5. Step 5: Solve for x
    x = 11,229,453,179.11/120,981
  6. Step 6: Final answer
    x = 92,819.97

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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.