Home / 205,990.32-308,735.94-87,412.56

Finding the Fourth Proportional to 205,990.32, 308,735.94 and 87,412.56

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Solution

The fourth proportional to 205,990.32, 308,735.94 and 87,412.56 is: 131,012.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,990.32 : 308,735.94 = 87,412.56 : x
  2. Step 2: Convert to fraction form
    205,990.32/308,735.94 = 87,412.56/x
  3. Step 3: Cross multiply
    205,990.32x = 308,735.94 × 87,412.56
  4. Step 4: Simplify right side
    205,990.32x = 26,987,398,879.41
  5. Step 5: Solve for x
    x = 26,987,398,879.41/205,990.32
  6. Step 6: Final answer
    x = 131,012.95

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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.