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Finding the Fourth Proportional to 79,281.75, 109,408.05 and 43,471.68

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Solution

The fourth proportional to 79,281.75, 109,408.05 and 43,471.68 is: 59,990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,281.75 : 109,408.05 = 43,471.68 : x
  2. Step 2: Convert to fraction form
    79,281.75/109,408.05 = 43,471.68/x
  3. Step 3: Cross multiply
    79,281.75x = 109,408.05 × 43,471.68
  4. Step 4: Simplify right side
    79,281.75x = 4,756,151,739.02
  5. Step 5: Solve for x
    x = 4,756,151,739.02/79,281.75
  6. Step 6: Final answer
    x = 59,990.50

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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.