Home / 90,821.20-136,231.80-80,798.80

Finding the Fourth Proportional to 90,821.20, 136,231.80 and 80,798.80

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Solution

The fourth proportional to 90,821.20, 136,231.80 and 80,798.80 is: 121,198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,821.20 : 136,231.80 = 80,798.80 : x
  2. Step 2: Convert to fraction form
    90,821.20/136,231.80 = 80,798.80/x
  3. Step 3: Cross multiply
    90,821.20x = 136,231.80 × 80,798.80
  4. Step 4: Simplify right side
    90,821.20x = 11,007,365,961.84
  5. Step 5: Solve for x
    x = 11,007,365,961.84/90,821.20
  6. Step 6: Final answer
    x = 121,198.20

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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.