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Finding the Fourth Proportional to 120,954.87, 166,922.00 and 66,511.18

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Solution

The fourth proportional to 120,954.87, 166,922.00 and 66,511.18 is: 91,787.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,954.87 : 166,922.00 = 66,511.18 : x
  2. Step 2: Convert to fraction form
    120,954.87/166,922.00 = 66,511.18/x
  3. Step 3: Cross multiply
    120,954.87x = 166,922.00 × 66,511.18
  4. Step 4: Simplify right side
    120,954.87x = 11,102,179,313.47
  5. Step 5: Solve for x
    x = 11,102,179,313.47/120,954.87
  6. Step 6: Final answer
    x = 91,787.78

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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.