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Finding the Fourth Proportional to 39,991.80, 59,901.30 and 33,079.80

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Solution

The fourth proportional to 39,991.80, 59,901.30 and 33,079.80 is: 49,548.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.80 : 59,901.30 = 33,079.80 : x
  2. Step 2: Convert to fraction form
    39,991.80/59,901.30 = 33,079.80/x
  3. Step 3: Cross multiply
    39,991.80x = 59,901.30 × 33,079.80
  4. Step 4: Simplify right side
    39,991.80x = 1,981,523,023.74
  5. Step 5: Solve for x
    x = 1,981,523,023.74/39,991.80
  6. Step 6: Final answer
    x = 49,548.23

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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.