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Finding the Fourth Proportional to 129,976.73, 179,361.46 and 72,604.67

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Solution

The fourth proportional to 129,976.73, 179,361.46 and 72,604.67 is: 100,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,976.73 : 179,361.46 = 72,604.67 : x
  2. Step 2: Convert to fraction form
    129,976.73/179,361.46 = 72,604.67/x
  3. Step 3: Cross multiply
    129,976.73x = 179,361.46 × 72,604.67
  4. Step 4: Simplify right side
    129,976.73x = 13,022,478,535.70
  5. Step 5: Solve for x
    x = 13,022,478,535.70/129,976.73
  6. Step 6: Final answer
    x = 100,190.85

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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.