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Finding the Fourth Proportional to 209,481.80, 289,087.38 and 113,986.44

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Solution

The fourth proportional to 209,481.80, 289,087.38 and 113,986.44 is: 157,302.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,481.80 : 289,087.38 = 113,986.44 : x
  2. Step 2: Convert to fraction form
    209,481.80/289,087.38 = 113,986.44/x
  3. Step 3: Cross multiply
    209,481.80x = 289,087.38 × 113,986.44
  4. Step 4: Simplify right side
    209,481.80x = 32,952,041,295.13
  5. Step 5: Solve for x
    x = 32,952,041,295.13/209,481.80
  6. Step 6: Final answer
    x = 157,302.65

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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.