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Finding the Fourth Proportional to 259,099.17, 388,611.84 and 81,601.56

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Solution

The fourth proportional to 259,099.17, 388,611.84 and 81,601.56 is: 122,390.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,099.17 : 388,611.84 = 81,601.56 : x
  2. Step 2: Convert to fraction form
    259,099.17/388,611.84 = 81,601.56/x
  3. Step 3: Cross multiply
    259,099.17x = 388,611.84 × 81,601.56
  4. Step 4: Simplify right side
    259,099.17x = 31,711,332,378.47
  5. Step 5: Solve for x
    x = 31,711,332,378.47/259,099.17
  6. Step 6: Final answer
    x = 122,390.71

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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.