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Finding the Fourth Proportional to 72,163.91, 108,168.09 and 40,982.15

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Solution

The fourth proportional to 72,163.91, 108,168.09 and 40,982.15 is: 61,429.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,163.91 : 108,168.09 = 40,982.15 : x
  2. Step 2: Convert to fraction form
    72,163.91/108,168.09 = 40,982.15/x
  3. Step 3: Cross multiply
    72,163.91x = 108,168.09 × 40,982.15
  4. Step 4: Simplify right side
    72,163.91x = 4,432,960,348.75
  5. Step 5: Solve for x
    x = 4,432,960,348.75/72,163.91
  6. Step 6: Final answer
    x = 61,429.05

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1.5x scale

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.