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Finding the Fourth Proportional to 111,297.28, 166,584.66 and 81,708.52

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Solution

The fourth proportional to 111,297.28, 166,584.66 and 81,708.52 is: 122,297.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,297.28 : 166,584.66 = 81,708.52 : x
  2. Step 2: Convert to fraction form
    111,297.28/166,584.66 = 81,708.52/x
  3. Step 3: Cross multiply
    111,297.28x = 166,584.66 × 81,708.52
  4. Step 4: Simplify right side
    111,297.28x = 13,611,386,023.30
  5. Step 5: Solve for x
    x = 13,611,386,023.30/111,297.28
  6. Step 6: Final answer
    x = 122,297.56

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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.