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Finding the Fourth Proportional to 143,819.29, 215,728.83 and 38,638.21

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Solution

The fourth proportional to 143,819.29, 215,728.83 and 38,638.21 is: 57,957.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,819.29 : 215,728.83 = 38,638.21 : x
  2. Step 2: Convert to fraction form
    143,819.29/215,728.83 = 38,638.21/x
  3. Step 3: Cross multiply
    143,819.29x = 215,728.83 × 38,638.21
  4. Step 4: Simplify right side
    143,819.29x = 8,335,375,836.59
  5. Step 5: Solve for x
    x = 8,335,375,836.59/143,819.29
  6. Step 6: Final answer
    x = 57,957.29

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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.