Home / 205,879.10-308,833.05-81,203.90

Finding the Fourth Proportional to 205,879.10, 308,833.05 and 81,203.90

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Solution

The fourth proportional to 205,879.10, 308,833.05 and 81,203.90 is: 121,811.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,879.10 : 308,833.05 = 81,203.90 : x
  2. Step 2: Convert to fraction form
    205,879.10/308,833.05 = 81,203.90/x
  3. Step 3: Cross multiply
    205,879.10x = 308,833.05 × 81,203.90
  4. Step 4: Simplify right side
    205,879.10x = 25,078,448,108.90
  5. Step 5: Solve for x
    x = 25,078,448,108.90/205,879.10
  6. Step 6: Final answer
    x = 121,811.53

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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.