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Finding the Fourth Proportional to 220,712.96, 331,035.96 and 80,471.72

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Solution

The fourth proportional to 220,712.96, 331,035.96 and 80,471.72 is: 120,695.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,712.96 : 331,035.96 = 80,471.72 : x
  2. Step 2: Convert to fraction form
    220,712.96/331,035.96 = 80,471.72/x
  3. Step 3: Cross multiply
    220,712.96x = 331,035.96 × 80,471.72
  4. Step 4: Simplify right side
    220,712.96x = 26,639,033,083.05
  5. Step 5: Solve for x
    x = 26,639,033,083.05/220,712.96
  6. Step 6: Final answer
    x = 120,695.37

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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.