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Finding the Fourth Proportional to 120,940.30, 166,899.60 and 66,494.76

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Solution

The fourth proportional to 120,940.30, 166,899.60 and 66,494.76 is: 91,763.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,940.30 : 166,899.60 = 66,494.76 : x
  2. Step 2: Convert to fraction form
    120,940.30/166,899.60 = 66,494.76/x
  3. Step 3: Cross multiply
    120,940.30x = 166,899.60 × 66,494.76
  4. Step 4: Simplify right side
    120,940.30x = 11,097,948,846.10
  5. Step 5: Solve for x
    x = 11,097,948,846.10/120,940.30
  6. Step 6: Final answer
    x = 91,763.86

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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.