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Finding the Fourth Proportional to 79,311.91, 109,408.98 and 47,027.74

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Solution

The fourth proportional to 79,311.91, 109,408.98 and 47,027.74 is: 64,873.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,311.91 : 109,408.98 = 47,027.74 : x
  2. Step 2: Convert to fraction form
    79,311.91/109,408.98 = 47,027.74/x
  3. Step 3: Cross multiply
    79,311.91x = 109,408.98 × 47,027.74
  4. Step 4: Simplify right side
    79,311.91x = 5,145,257,065.11
  5. Step 5: Solve for x
    x = 5,145,257,065.11/79,311.91
  6. Step 6: Final answer
    x = 64,873.70

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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.