Home / 205,912.40-308,638.20-87,563.60

Finding the Fourth Proportional to 205,912.40, 308,638.20 and 87,563.60

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Solution

The fourth proportional to 205,912.40, 308,638.20 and 87,563.60 is: 131,247.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,912.40 : 308,638.20 = 87,563.60 : x
  2. Step 2: Convert to fraction form
    205,912.40/308,638.20 = 87,563.60/x
  3. Step 3: Cross multiply
    205,912.40x = 308,638.20 × 87,563.60
  4. Step 4: Simplify right side
    205,912.40x = 27,025,471,889.52
  5. Step 5: Solve for x
    x = 27,025,471,889.52/205,912.40
  6. Step 6: Final answer
    x = 131,247.42

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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.