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Finding the Fourth Proportional to 221,220.36, 331,831.86 and 55,008.36

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Solution

The fourth proportional to 221,220.36, 331,831.86 and 55,008.36 is: 82,512.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,220.36 : 331,831.86 = 55,008.36 : x
  2. Step 2: Convert to fraction form
    221,220.36/331,831.86 = 55,008.36/x
  3. Step 3: Cross multiply
    221,220.36x = 331,831.86 × 55,008.36
  4. Step 4: Simplify right side
    221,220.36x = 18,253,526,414.35
  5. Step 5: Solve for x
    x = 18,253,526,414.35/221,220.36
  6. Step 6: Final answer
    x = 82,512.87

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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.