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Finding the Fourth Proportional to 193,254.20, 289,866.90 and 80,905.40

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Solution

The fourth proportional to 193,254.20, 289,866.90 and 80,905.40 is: 121,352.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,254.20 : 289,866.90 = 80,905.40 : x
  2. Step 2: Convert to fraction form
    193,254.20/289,866.90 = 80,905.40/x
  3. Step 3: Cross multiply
    193,254.20x = 289,866.90 × 80,905.40
  4. Step 4: Simplify right side
    193,254.20x = 23,451,797,491.26
  5. Step 5: Solve for x
    x = 23,451,797,491.26/193,254.20
  6. Step 6: Final answer
    x = 121,352.07

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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.