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Finding the Fourth Proportional to 67,315.10, 100,861.92 and 53,364.78

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Solution

The fourth proportional to 67,315.10, 100,861.92 and 53,364.78 is: 79,959.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,315.10 : 100,861.92 = 53,364.78 : x
  2. Step 2: Convert to fraction form
    67,315.10/100,861.92 = 53,364.78/x
  3. Step 3: Cross multiply
    67,315.10x = 100,861.92 × 53,364.78
  4. Step 4: Simplify right side
    67,315.10x = 5,382,474,171.18
  5. Step 5: Solve for x
    x = 5,382,474,171.18/67,315.10
  6. Step 6: Final answer
    x = 79,959.39

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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.