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Finding the Fourth Proportional to 79,478.82, 109,680.68 and 43,668.74

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Solution

The fourth proportional to 79,478.82, 109,680.68 and 43,668.74 is: 60,262.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478.82 : 109,680.68 = 43,668.74 : x
  2. Step 2: Convert to fraction form
    79,478.82/109,680.68 = 43,668.74/x
  3. Step 3: Cross multiply
    79,478.82x = 109,680.68 × 43,668.74
  4. Step 4: Simplify right side
    79,478.82x = 4,789,617,481.32
  5. Step 5: Solve for x
    x = 4,789,617,481.32/79,478.82
  6. Step 6: Final answer
    x = 60,262.82

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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.