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Finding the Fourth Proportional to 259,282.26, 388,923.39 and 81,807.21

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Solution

The fourth proportional to 259,282.26, 388,923.39 and 81,807.21 is: 122,710.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,282.26 : 388,923.39 = 81,807.21 : x
  2. Step 2: Convert to fraction form
    259,282.26/388,923.39 = 81,807.21/x
  3. Step 3: Cross multiply
    259,282.26x = 388,923.39 × 81,807.21
  4. Step 4: Simplify right side
    259,282.26x = 31,816,737,439.64
  5. Step 5: Solve for x
    x = 31,816,737,439.64/259,282.26
  6. Step 6: Final answer
    x = 122,710.82

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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.