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Finding the Fourth Proportional to 79,311.96, 109,412.78 and 47,474.71

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Solution

The fourth proportional to 79,311.96, 109,412.78 and 47,474.71 is: 65,492.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,311.96 : 109,412.78 = 47,474.71 : x
  2. Step 2: Convert to fraction form
    79,311.96/109,412.78 = 47,474.71/x
  3. Step 3: Cross multiply
    79,311.96x = 109,412.78 × 47,474.71
  4. Step 4: Simplify right side
    79,311.96x = 5,194,340,000.79
  5. Step 5: Solve for x
    x = 5,194,340,000.79/79,311.96
  6. Step 6: Final answer
    x = 65,492.52

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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.