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Finding the Fourth Proportional to 79,813.92, 119,755.68 and 42,834.72

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Solution

The fourth proportional to 79,813.92, 119,755.68 and 42,834.72 is: 64,270.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,813.92 : 119,755.68 = 42,834.72 : x
  2. Step 2: Convert to fraction form
    79,813.92/119,755.68 = 42,834.72/x
  3. Step 3: Cross multiply
    79,813.92x = 119,755.68 × 42,834.72
  4. Step 4: Simplify right side
    79,813.92x = 5,129,701,021.21
  5. Step 5: Solve for x
    x = 5,129,701,021.21/79,813.92
  6. Step 6: Final answer
    x = 64,270.76

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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.