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Finding the Fourth Proportional to 111,028.40, 166,445.40 and 66,672.80

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Solution

The fourth proportional to 111,028.40, 166,445.40 and 66,672.80 is: 99,950.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,028.40 : 166,445.40 = 66,672.80 : x
  2. Step 2: Convert to fraction form
    111,028.40/166,445.40 = 66,672.80/x
  3. Step 3: Cross multiply
    111,028.40x = 166,445.40 × 66,672.80
  4. Step 4: Simplify right side
    111,028.40x = 11,097,380,865.12
  5. Step 5: Solve for x
    x = 11,097,380,865.12/111,028.40
  6. Step 6: Final answer
    x = 99,950.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.