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Finding the Fourth Proportional to 221,571.92, 305,768.04 and 120,969.20

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Solution

The fourth proportional to 221,571.92, 305,768.04 and 120,969.20 is: 166,936.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,571.92 : 305,768.04 = 120,969.20 : x
  2. Step 2: Convert to fraction form
    221,571.92/305,768.04 = 120,969.20/x
  3. Step 3: Cross multiply
    221,571.92x = 305,768.04 × 120,969.20
  4. Step 4: Simplify right side
    221,571.92x = 36,988,515,184.37
  5. Step 5: Solve for x
    x = 36,988,515,184.37/221,571.92
  6. Step 6: Final answer
    x = 166,936.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.