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Finding the Fourth Proportional to 220,808.70, 331,322.40 and 126,111.60

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Solution

The fourth proportional to 220,808.70, 331,322.40 and 126,111.60 is: 189,229.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,808.70 : 331,322.40 = 126,111.60 : x
  2. Step 2: Convert to fraction form
    220,808.70/331,322.40 = 126,111.60/x
  3. Step 3: Cross multiply
    220,808.70x = 331,322.40 × 126,111.60
  4. Step 4: Simplify right side
    220,808.70x = 41,783,597,979.84
  5. Step 5: Solve for x
    x = 41,783,597,979.84/220,808.70
  6. Step 6: Final answer
    x = 189,229.85

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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.