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Finding the Fourth Proportional to 259,231.80, 388,847.70 and 72,243.30

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Solution

The fourth proportional to 259,231.80, 388,847.70 and 72,243.30 is: 108,364.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,231.80 : 388,847.70 = 72,243.30 : x
  2. Step 2: Convert to fraction form
    259,231.80/388,847.70 = 72,243.30/x
  3. Step 3: Cross multiply
    259,231.80x = 388,847.70 × 72,243.30
  4. Step 4: Simplify right side
    259,231.80x = 28,091,641,045.41
  5. Step 5: Solve for x
    x = 28,091,641,045.41/259,231.80
  6. Step 6: Final answer
    x = 108,364.95

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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.