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Finding the Fourth Proportional to 166,720, 230,073.78 and 91,268.68

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Solution

The fourth proportional to 166,720, 230,073.78 and 91,268.68 is: 125,950.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,720 : 230,073.78 = 91,268.68 : x
  2. Step 2: Convert to fraction form
    166,720/230,073.78 = 91,268.68/x
  3. Step 3: Cross multiply
    166,720x = 230,073.78 × 91,268.68
  4. Step 4: Simplify right side
    166,720x = 20,998,530,203.21
  5. Step 5: Solve for x
    x = 20,998,530,203.21/166,720
  6. Step 6: Final answer
    x = 125,950.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.