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Finding the Fourth Proportional to 219,926.71, 303,480.70 and 129,286.50

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Solution

The fourth proportional to 219,926.71, 303,480.70 and 129,286.50 is: 178,404.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,926.71 : 303,480.70 = 129,286.50 : x
  2. Step 2: Convert to fraction form
    219,926.71/303,480.70 = 129,286.50/x
  3. Step 3: Cross multiply
    219,926.71x = 303,480.70 × 129,286.50
  4. Step 4: Simplify right side
    219,926.71x = 39,235,957,520.55
  5. Step 5: Solve for x
    x = 39,235,957,520.55/219,926.71
  6. Step 6: Final answer
    x = 178,404.69

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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.