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Finding the Fourth Proportional to 111,221.68, 166,832.52 and 28,115.68

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Solution

The fourth proportional to 111,221.68, 166,832.52 and 28,115.68 is: 42,173.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,221.68 : 166,832.52 = 28,115.68 : x
  2. Step 2: Convert to fraction form
    111,221.68/166,832.52 = 28,115.68/x
  3. Step 3: Cross multiply
    111,221.68x = 166,832.52 × 28,115.68
  4. Step 4: Simplify right side
    111,221.68x = 4,690,609,745.91
  5. Step 5: Solve for x
    x = 4,690,609,745.91/111,221.68
  6. Step 6: Final answer
    x = 42,173.52

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1.5x scale

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.