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Finding the Fourth Proportional to 70,015.20, 104,991.21 and 20,083.97

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Solution

The fourth proportional to 70,015.20, 104,991.21 and 20,083.97 is: 30,116.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,015.20 : 104,991.21 = 20,083.97 : x
  2. Step 2: Convert to fraction form
    70,015.20/104,991.21 = 20,083.97/x
  3. Step 3: Cross multiply
    70,015.20x = 104,991.21 × 20,083.97
  4. Step 4: Simplify right side
    70,015.20x = 2,108,639,786.95
  5. Step 5: Solve for x
    x = 2,108,639,786.95/70,015.20
  6. Step 6: Final answer
    x = 30,116.89

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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.