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Finding the Fourth Proportional to 143,989.49, 215,969.65 and 38,819.09

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Solution

The fourth proportional to 143,989.49, 215,969.65 and 38,819.09 is: 58,224.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,989.49 : 215,969.65 = 38,819.09 : x
  2. Step 2: Convert to fraction form
    143,989.49/215,969.65 = 38,819.09/x
  3. Step 3: Cross multiply
    143,989.49x = 215,969.65 × 38,819.09
  4. Step 4: Simplify right side
    143,989.49x = 8,383,744,006.67
  5. Step 5: Solve for x
    x = 8,383,744,006.67/143,989.49
  6. Step 6: Final answer
    x = 58,224.70

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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.