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Finding the Fourth Proportional to 80,072, 120,108 and 21,704

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Solution

The fourth proportional to 80,072, 120,108 and 21,704 is: 32,556

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,072 : 120,108 = 21,704 : x
  2. Step 2: Convert to fraction form
    80,072/120,108 = 21,704/x
  3. Step 3: Cross multiply
    80,072x = 120,108 × 21,704
  4. Step 4: Simplify right side
    80,072x = 2,606,824,032
  5. Step 5: Solve for x
    x = 2,606,824,032/80,072
  6. Step 6: Final answer
    x = 32,556

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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.