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Finding the Fourth Proportional to 252,122.40, 378,183.06 and 85,910.40

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Solution

The fourth proportional to 252,122.40, 378,183.06 and 85,910.40 is: 128,865.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,122.40 : 378,183.06 = 85,910.40 : x
  2. Step 2: Convert to fraction form
    252,122.40/378,183.06 = 85,910.40/x
  3. Step 3: Cross multiply
    252,122.40x = 378,183.06 × 85,910.40
  4. Step 4: Simplify right side
    252,122.40x = 32,489,857,957.82
  5. Step 5: Solve for x
    x = 32,489,857,957.82/252,122.40
  6. Step 6: Final answer
    x = 128,865.42

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1.5x scale

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.