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Finding the Fourth Proportional to 221,318.72, 332,310.18 and 126,655.80

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Solution

The fourth proportional to 221,318.72, 332,310.18 and 126,655.80 is: 190,173.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,318.72 : 332,310.18 = 126,655.80 : x
  2. Step 2: Convert to fraction form
    221,318.72/332,310.18 = 126,655.80/x
  3. Step 3: Cross multiply
    221,318.72x = 332,310.18 × 126,655.80
  4. Step 4: Simplify right side
    221,318.72x = 42,089,011,696.04
  5. Step 5: Solve for x
    x = 42,089,011,696.04/221,318.72
  6. Step 6: Final answer
    x = 190,173.76

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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.