Home / 206,621.78-309,791.16-105,223.54

Finding the Fourth Proportional to 206,621.78, 309,791.16 and 105,223.54

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Solution

The fourth proportional to 206,621.78, 309,791.16 and 105,223.54 is: 157,763.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,621.78 : 309,791.16 = 105,223.54 : x
  2. Step 2: Convert to fraction form
    206,621.78/309,791.16 = 105,223.54/x
  3. Step 3: Cross multiply
    206,621.78x = 309,791.16 × 105,223.54
  4. Step 4: Simplify right side
    206,621.78x = 32,597,322,515.91
  5. Step 5: Solve for x
    x = 32,597,322,515.91/206,621.78
  6. Step 6: Final answer
    x = 157,763.25

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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.