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Finding the Fourth Proportional to 111,426.81, 167,137.78 and 27,187.71

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Solution

The fourth proportional to 111,426.81, 167,137.78 and 27,187.71 is: 40,780.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,426.81 : 167,137.78 = 27,187.71 : x
  2. Step 2: Convert to fraction form
    111,426.81/167,137.78 = 27,187.71/x
  3. Step 3: Cross multiply
    111,426.81x = 167,137.78 × 27,187.71
  4. Step 4: Simplify right side
    111,426.81x = 4,544,092,589.03
  5. Step 5: Solve for x
    x = 4,544,092,589.03/111,426.81
  6. Step 6: Final answer
    x = 40,780.96

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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.