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Finding the Fourth Proportional to 221,220, 331,831.29 and 55,008

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Solution

The fourth proportional to 221,220, 331,831.29 and 55,008 is: 82,512.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,220 : 331,831.29 = 55,008 : x
  2. Step 2: Convert to fraction form
    221,220/331,831.29 = 55,008/x
  3. Step 3: Cross multiply
    221,220x = 331,831.29 × 55,008
  4. Step 4: Simplify right side
    221,220x = 18,253,375,600.32
  5. Step 5: Solve for x
    x = 18,253,375,600.32/221,220
  6. Step 6: Final answer
    x = 82,512.32

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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.