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Finding the Fourth Proportional to 408,057.70, 612,086.55 and 108,537.70

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Solution

The fourth proportional to 408,057.70, 612,086.55 and 108,537.70 is: 162,806.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,057.70 : 612,086.55 = 108,537.70 : x
  2. Step 2: Convert to fraction form
    408,057.70/612,086.55 = 108,537.70/x
  3. Step 3: Cross multiply
    408,057.70x = 612,086.55 × 108,537.70
  4. Step 4: Simplify right side
    408,057.70x = 66,434,466,337.94
  5. Step 5: Solve for x
    x = 66,434,466,337.94/408,057.70
  6. Step 6: Final answer
    x = 162,806.55

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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.