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Finding the Fourth Proportional to 79,481.65, 119,222.85 and 20,317.32

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Solution

The fourth proportional to 79,481.65, 119,222.85 and 20,317.32 is: 30,476.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,481.65 : 119,222.85 = 20,317.32 : x
  2. Step 2: Convert to fraction form
    79,481.65/119,222.85 = 20,317.32/x
  3. Step 3: Cross multiply
    79,481.65x = 119,222.85 × 20,317.32
  4. Step 4: Simplify right side
    79,481.65x = 2,422,288,304.64
  5. Step 5: Solve for x
    x = 2,422,288,304.64/79,481.65
  6. Step 6: Final answer
    x = 30,476.07

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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.