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Finding the Fourth Proportional to 79,684.32, 109,964.52 and 43,876.80

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Solution

The fourth proportional to 79,684.32, 109,964.52 and 43,876.80 is: 60,550.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,684.32 : 109,964.52 = 43,876.80 : x
  2. Step 2: Convert to fraction form
    79,684.32/109,964.52 = 43,876.80/x
  3. Step 3: Cross multiply
    79,684.32x = 109,964.52 × 43,876.80
  4. Step 4: Simplify right side
    79,684.32x = 4,824,891,251.14
  5. Step 5: Solve for x
    x = 4,824,891,251.14/79,684.32
  6. Step 6: Final answer
    x = 60,550.07

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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.