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Finding the Fourth Proportional to 79,321.96, 109,465.76 and 43,513.80

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Solution

The fourth proportional to 79,321.96, 109,465.76 and 43,513.80 is: 60,049.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,321.96 : 109,465.76 = 43,513.80 : x
  2. Step 2: Convert to fraction form
    79,321.96/109,465.76 = 43,513.80/x
  3. Step 3: Cross multiply
    79,321.96x = 109,465.76 × 43,513.80
  4. Step 4: Simplify right side
    79,321.96x = 4,763,271,187.49
  5. Step 5: Solve for x
    x = 4,763,271,187.49/79,321.96
  6. Step 6: Final answer
    x = 60,049.84

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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.