Home / 79,121.46-109,188.24-43,311.78

Finding the Fourth Proportional to 79,121.46, 109,188.24 and 43,311.78

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Solution

The fourth proportional to 79,121.46, 109,188.24 and 43,311.78 is: 59,770.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.46 : 109,188.24 = 43,311.78 : x
  2. Step 2: Convert to fraction form
    79,121.46/109,188.24 = 43,311.78/x
  3. Step 3: Cross multiply
    79,121.46x = 109,188.24 × 43,311.78
  4. Step 4: Simplify right side
    79,121.46x = 4,729,137,029.47
  5. Step 5: Solve for x
    x = 4,729,137,029.47/79,121.46
  6. Step 6: Final answer
    x = 59,770.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.