Home / 419,581.50-629,471.88-139,098.75

Finding the Fourth Proportional to 419,581.50, 629,471.88 and 139,098.75

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Solution

The fourth proportional to 419,581.50, 629,471.88 and 139,098.75 is: 208,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,581.50 : 629,471.88 = 139,098.75 : x
  2. Step 2: Convert to fraction form
    419,581.50/629,471.88 = 139,098.75/x
  3. Step 3: Cross multiply
    419,581.50x = 629,471.88 × 139,098.75
  4. Step 4: Simplify right side
    419,581.50x = 87,558,751,668.15
  5. Step 5: Solve for x
    x = 87,558,751,668.15/419,581.50
  6. Step 6: Final answer
    x = 208,681.15

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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.