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Finding the Fourth Proportional to 79,212.70, 118,819.23 and 19,240.91

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Solution

The fourth proportional to 79,212.70, 118,819.23 and 19,240.91 is: 28,861.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,212.70 : 118,819.23 = 19,240.91 : x
  2. Step 2: Convert to fraction form
    79,212.70/118,819.23 = 19,240.91/x
  3. Step 3: Cross multiply
    79,212.70x = 118,819.23 × 19,240.91
  4. Step 4: Simplify right side
    79,212.70x = 2,286,189,944.14
  5. Step 5: Solve for x
    x = 2,286,189,944.14/79,212.70
  6. Step 6: Final answer
    x = 28,861.41

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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.