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Finding the Fourth Proportional to 120,369.45, 166,096.33 and 66,640.98

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Solution

The fourth proportional to 120,369.45, 166,096.33 and 66,640.98 is: 91,957.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,369.45 : 166,096.33 = 66,640.98 : x
  2. Step 2: Convert to fraction form
    120,369.45/166,096.33 = 66,640.98/x
  3. Step 3: Cross multiply
    120,369.45x = 166,096.33 × 66,640.98
  4. Step 4: Simplify right side
    120,369.45x = 11,068,822,205.60
  5. Step 5: Solve for x
    x = 11,068,822,205.60/120,369.45
  6. Step 6: Final answer
    x = 91,957.07

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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.