Home / 129,991.20-195,007.44-55,111.68

Finding the Fourth Proportional to 129,991.20, 195,007.44 and 55,111.68

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Solution

The fourth proportional to 129,991.20, 195,007.44 and 55,111.68 is: 82,676.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,991.20 : 195,007.44 = 55,111.68 : x
  2. Step 2: Convert to fraction form
    129,991.20/195,007.44 = 55,111.68/x
  3. Step 3: Cross multiply
    129,991.20x = 195,007.44 × 55,111.68
  4. Step 4: Simplify right side
    129,991.20x = 10,747,187,630.90
  5. Step 5: Solve for x
    x = 10,747,187,630.90/129,991.20
  6. Step 6: Final answer
    x = 82,676.27

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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.