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Finding the Fourth Proportional to 111,319.92, 166,868.64 and 71,904.96

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Solution

The fourth proportional to 111,319.92, 166,868.64 and 71,904.96 is: 107,785.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,319.92 : 166,868.64 = 71,904.96 : x
  2. Step 2: Convert to fraction form
    111,319.92/166,868.64 = 71,904.96/x
  3. Step 3: Cross multiply
    111,319.92x = 166,868.64 × 71,904.96
  4. Step 4: Simplify right side
    111,319.92x = 11,998,682,884.45
  5. Step 5: Solve for x
    x = 11,998,682,884.45/111,319.92
  6. Step 6: Final answer
    x = 107,785.59

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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.