Home / 206,738.85-309,911.41-66,399.06

Finding the Fourth Proportional to 206,738.85, 309,911.41 and 66,399.06

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Solution

The fourth proportional to 206,738.85, 309,911.41 and 66,399.06 is: 99,535.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,738.85 : 309,911.41 = 66,399.06 : x
  2. Step 2: Convert to fraction form
    206,738.85/309,911.41 = 66,399.06/x
  3. Step 3: Cross multiply
    206,738.85x = 309,911.41 × 66,399.06
  4. Step 4: Simplify right side
    206,738.85x = 20,577,826,307.27
  5. Step 5: Solve for x
    x = 20,577,826,307.27/206,738.85
  6. Step 6: Final answer
    x = 99,535.36

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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.