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Finding the Fourth Proportional to 79,540.92, 109,767.21 and 43,731.20

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Solution

The fourth proportional to 79,540.92, 109,767.21 and 43,731.20 is: 60,349.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,540.92 : 109,767.21 = 43,731.20 : x
  2. Step 2: Convert to fraction form
    79,540.92/109,767.21 = 43,731.20/x
  3. Step 3: Cross multiply
    79,540.92x = 109,767.21 × 43,731.20
  4. Step 4: Simplify right side
    79,540.92x = 4,800,251,265.12
  5. Step 5: Solve for x
    x = 4,800,251,265.12/79,540.92
  6. Step 6: Final answer
    x = 60,349.46

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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.