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Finding the Fourth Proportional to 221,520.16, 305,704.74 and 126,040.60

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Solution

The fourth proportional to 221,520.16, 305,704.74 and 126,040.60 is: 173,939.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,520.16 : 305,704.74 = 126,040.60 : x
  2. Step 2: Convert to fraction form
    221,520.16/305,704.74 = 126,040.60/x
  3. Step 3: Cross multiply
    221,520.16x = 305,704.74 × 126,040.60
  4. Step 4: Simplify right side
    221,520.16x = 38,531,208,852.44
  5. Step 5: Solve for x
    x = 38,531,208,852.44/221,520.16
  6. Step 6: Final answer
    x = 173,939.96

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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.