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Finding the Fourth Proportional to 111,309, 166,973.22 and 28,203

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Solution

The fourth proportional to 111,309, 166,973.22 and 28,203 is: 42,306.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,309 : 166,973.22 = 28,203 : x
  2. Step 2: Convert to fraction form
    111,309/166,973.22 = 28,203/x
  3. Step 3: Cross multiply
    111,309x = 166,973.22 × 28,203
  4. Step 4: Simplify right side
    111,309x = 4,709,145,723.66
  5. Step 5: Solve for x
    x = 4,709,145,723.66/111,309
  6. Step 6: Final answer
    x = 42,306.96

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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.