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Finding the Fourth Proportional to 80,608.72, 120,912.94 and 21,444.39

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Solution

The fourth proportional to 80,608.72, 120,912.94 and 21,444.39 is: 32,166.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,608.72 : 120,912.94 = 21,444.39 : x
  2. Step 2: Convert to fraction form
    80,608.72/120,912.94 = 21,444.39/x
  3. Step 3: Cross multiply
    80,608.72x = 120,912.94 × 21,444.39
  4. Step 4: Simplify right side
    80,608.72x = 2,592,904,134.18
  5. Step 5: Solve for x
    x = 2,592,904,134.18/80,608.72
  6. Step 6: Final answer
    x = 32,166.55

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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.