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Finding the Fourth Proportional to 72,108, 108,162 and 22,860

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Solution

The fourth proportional to 72,108, 108,162 and 22,860 is: 34,290

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,108 : 108,162 = 22,860 : x
  2. Step 2: Convert to fraction form
    72,108/108,162 = 22,860/x
  3. Step 3: Cross multiply
    72,108x = 108,162 × 22,860
  4. Step 4: Simplify right side
    72,108x = 2,472,583,320
  5. Step 5: Solve for x
    x = 2,472,583,320/72,108
  6. Step 6: Final answer
    x = 34,290

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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.