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Finding the Fourth Proportional to 79,440.72, 119,161 and 20,276.40

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Solution

The fourth proportional to 79,440.72, 119,161 and 20,276.40 is: 30,414.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,440.72 : 119,161 = 20,276.40 : x
  2. Step 2: Convert to fraction form
    79,440.72/119,161 = 20,276.40/x
  3. Step 3: Cross multiply
    79,440.72x = 119,161 × 20,276.40
  4. Step 4: Simplify right side
    79,440.72x = 2,416,156,100.40
  5. Step 5: Solve for x
    x = 2,416,156,100.40/79,440.72
  6. Step 6: Final answer
    x = 30,414.58

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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.