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Finding the Fourth Proportional to 79,694.10, 119,614.95 and 40,278.78

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Solution

The fourth proportional to 79,694.10, 119,614.95 and 40,278.78 is: 60,455.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,694.10 : 119,614.95 = 40,278.78 : x
  2. Step 2: Convert to fraction form
    79,694.10/119,614.95 = 40,278.78/x
  3. Step 3: Cross multiply
    79,694.10x = 119,614.95 × 40,278.78
  4. Step 4: Simplify right side
    79,694.10x = 4,817,944,255.76
  5. Step 5: Solve for x
    x = 4,817,944,255.76/79,694.10
  6. Step 6: Final answer
    x = 60,455.47

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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.