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Finding the Fourth Proportional to 248,299.26, 342,629.26 and 139,378.65

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Solution

The fourth proportional to 248,299.26, 342,629.26 and 139,378.65 is: 192,329.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,299.26 : 342,629.26 = 139,378.65 : x
  2. Step 2: Convert to fraction form
    248,299.26/342,629.26 = 139,378.65/x
  3. Step 3: Cross multiply
    248,299.26x = 342,629.26 × 139,378.65
  4. Step 4: Simplify right side
    248,299.26x = 47,755,203,709.30
  5. Step 5: Solve for x
    x = 47,755,203,709.30/248,299.26
  6. Step 6: Final answer
    x = 192,329.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.