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Finding the Fourth Proportional to 167,618.70, 231,311.16 and 91,139.31

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Solution

The fourth proportional to 167,618.70, 231,311.16 and 91,139.31 is: 125,770.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,618.70 : 231,311.16 = 91,139.31 : x
  2. Step 2: Convert to fraction form
    167,618.70/231,311.16 = 91,139.31/x
  3. Step 3: Cross multiply
    167,618.70x = 231,311.16 × 91,139.31
  4. Step 4: Simplify right side
    167,618.70x = 21,081,539,517.70
  5. Step 5: Solve for x
    x = 21,081,539,517.70/167,618.70
  6. Step 6: Final answer
    x = 125,770.81

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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.