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Finding the Fourth Proportional to 79,861.11, 119,689.90 and 42,439.11

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Solution

The fourth proportional to 79,861.11, 119,689.90 and 42,439.11 is: 63,604.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,861.11 : 119,689.90 = 42,439.11 : x
  2. Step 2: Convert to fraction form
    79,861.11/119,689.90 = 42,439.11/x
  3. Step 3: Cross multiply
    79,861.11x = 119,689.90 × 42,439.11
  4. Step 4: Simplify right side
    79,861.11x = 5,079,532,515.77
  5. Step 5: Solve for x
    x = 5,079,532,515.77/79,861.11
  6. Step 6: Final answer
    x = 63,604.58

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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.