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Finding the Fourth Proportional to 83,996.58, 125,991.72 and 20,816.91

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Solution

The fourth proportional to 83,996.58, 125,991.72 and 20,816.91 is: 31,224.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,996.58 : 125,991.72 = 20,816.91 : x
  2. Step 2: Convert to fraction form
    83,996.58/125,991.72 = 20,816.91/x
  3. Step 3: Cross multiply
    83,996.58x = 125,991.72 × 20,816.91
  4. Step 4: Simplify right side
    83,996.58x = 2,622,758,295.99
  5. Step 5: Solve for x
    x = 2,622,758,295.99/83,996.58
  6. Step 6: Final answer
    x = 31,224.58

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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.