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Finding the Fourth Proportional to 193,210.70, 289,801.65 and 80,861.90

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Solution

The fourth proportional to 193,210.70, 289,801.65 and 80,861.90 is: 121,286.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,210.70 : 289,801.65 = 80,861.90 : x
  2. Step 2: Convert to fraction form
    193,210.70/289,801.65 = 80,861.90/x
  3. Step 3: Cross multiply
    193,210.70x = 289,801.65 × 80,861.90
  4. Step 4: Simplify right side
    193,210.70x = 23,433,912,042.14
  5. Step 5: Solve for x
    x = 23,433,912,042.14/193,210.70
  6. Step 6: Final answer
    x = 121,286.82

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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.