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Finding the Fourth Proportional to 79,720.92, 110,019.87 and 43,910.91

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Solution

The fourth proportional to 79,720.92, 110,019.87 and 43,910.91 is: 60,599.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,720.92 : 110,019.87 = 43,910.91 : x
  2. Step 2: Convert to fraction form
    79,720.92/110,019.87 = 43,910.91/x
  3. Step 3: Cross multiply
    79,720.92x = 110,019.87 × 43,910.91
  4. Step 4: Simplify right side
    79,720.92x = 4,831,072,609.78
  5. Step 5: Solve for x
    x = 4,831,072,609.78/79,720.92
  6. Step 6: Final answer
    x = 60,599.81

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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.