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Finding the Fourth Proportional to 259,021.80, 388,532.70 and 72,033.30

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Solution

The fourth proportional to 259,021.80, 388,532.70 and 72,033.30 is: 108,049.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,021.80 : 388,532.70 = 72,033.30 : x
  2. Step 2: Convert to fraction form
    259,021.80/388,532.70 = 72,033.30/x
  3. Step 3: Cross multiply
    259,021.80x = 388,532.70 × 72,033.30
  4. Step 4: Simplify right side
    259,021.80x = 27,987,292,538.91
  5. Step 5: Solve for x
    x = 27,987,292,538.91/259,021.80
  6. Step 6: Final answer
    x = 108,049.95

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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.