Home / 131,890.20-197,835.30-81,151.80

Finding the Fourth Proportional to 131,890.20, 197,835.30 and 81,151.80

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Solution

The fourth proportional to 131,890.20, 197,835.30 and 81,151.80 is: 121,727.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,890.20 : 197,835.30 = 81,151.80 : x
  2. Step 2: Convert to fraction form
    131,890.20/197,835.30 = 81,151.80/x
  3. Step 3: Cross multiply
    131,890.20x = 197,835.30 × 81,151.80
  4. Step 4: Simplify right side
    131,890.20x = 16,054,690,698.54
  5. Step 5: Solve for x
    x = 16,054,690,698.54/131,890.20
  6. Step 6: Final answer
    x = 121,727.70

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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.