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Finding the Fourth Proportional to 221,231.40, 331,808.70 and 80,917.80

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Solution

The fourth proportional to 221,231.40, 331,808.70 and 80,917.80 is: 121,362.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,231.40 : 331,808.70 = 80,917.80 : x
  2. Step 2: Convert to fraction form
    221,231.40/331,808.70 = 80,917.80/x
  3. Step 3: Cross multiply
    221,231.40x = 331,808.70 × 80,917.80
  4. Step 4: Simplify right side
    221,231.40x = 26,849,230,024.86
  5. Step 5: Solve for x
    x = 26,849,230,024.86/221,231.40
  6. Step 6: Final answer
    x = 121,362.65

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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.