Home / 205,861.10-308,906.85-87,512.30

Finding the Fourth Proportional to 205,861.10, 308,906.85 and 87,512.30

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Solution

The fourth proportional to 205,861.10, 308,906.85 and 87,512.30 is: 131,317.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,861.10 : 308,906.85 = 87,512.30 : x
  2. Step 2: Convert to fraction form
    205,861.10/308,906.85 = 87,512.30/x
  3. Step 3: Cross multiply
    205,861.10x = 308,906.85 × 87,512.30
  4. Step 4: Simplify right side
    205,861.10x = 27,033,148,929.26
  5. Step 5: Solve for x
    x = 27,033,148,929.26/205,861.10
  6. Step 6: Final answer
    x = 131,317.42

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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.