Home / 80,961.20-121,441.80-66,186.80

Finding the Fourth Proportional to 80,961.20, 121,441.80 and 66,186.80

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Solution

The fourth proportional to 80,961.20, 121,441.80 and 66,186.80 is: 99,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,961.20 : 121,441.80 = 66,186.80 : x
  2. Step 2: Convert to fraction form
    80,961.20/121,441.80 = 66,186.80/x
  3. Step 3: Cross multiply
    80,961.20x = 121,441.80 × 66,186.80
  4. Step 4: Simplify right side
    80,961.20x = 8,037,844,128.24
  5. Step 5: Solve for x
    x = 8,037,844,128.24/80,961.20
  6. Step 6: Final answer
    x = 99,280.20

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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.