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Finding the Fourth Proportional to 79,475.78, 119,213.37 and 20,311.36

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Solution

The fourth proportional to 79,475.78, 119,213.37 and 20,311.36 is: 30,466.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,475.78 : 119,213.37 = 20,311.36 : x
  2. Step 2: Convert to fraction form
    79,475.78/119,213.37 = 20,311.36/x
  3. Step 3: Cross multiply
    79,475.78x = 119,213.37 × 20,311.36
  4. Step 4: Simplify right side
    79,475.78x = 2,421,385,376.85
  5. Step 5: Solve for x
    x = 2,421,385,376.85/79,475.78
  6. Step 6: Final answer
    x = 30,466.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.