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Finding the Fourth Proportional to 79,674.92, 119,516.70 and 40,185.80

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Solution

The fourth proportional to 79,674.92, 119,516.70 and 40,185.80 is: 60,280.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,674.92 : 119,516.70 = 40,185.80 : x
  2. Step 2: Convert to fraction form
    79,674.92/119,516.70 = 40,185.80/x
  3. Step 3: Cross multiply
    79,674.92x = 119,516.70 × 40,185.80
  4. Step 4: Simplify right side
    79,674.92x = 4,802,874,202.86
  5. Step 5: Solve for x
    x = 4,802,874,202.86/79,674.92
  6. Step 6: Final answer
    x = 60,280.88

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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.