Home / 131,991.20-197,727.60-90,000.80

Finding the Fourth Proportional to 131,991.20, 197,727.60 and 90,000.80

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Solution

The fourth proportional to 131,991.20, 197,727.60 and 90,000.80 is: 134,824.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,991.20 : 197,727.60 = 90,000.80 : x
  2. Step 2: Convert to fraction form
    131,991.20/197,727.60 = 90,000.80/x
  3. Step 3: Cross multiply
    131,991.20x = 197,727.60 × 90,000.80
  4. Step 4: Simplify right side
    131,991.20x = 17,795,642,182.08
  5. Step 5: Solve for x
    x = 17,795,642,182.08/131,991.20
  6. Step 6: Final answer
    x = 134,824.46

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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.