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Finding the Fourth Proportional to 245,619, 338,954.22 and 139,635

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Solution

The fourth proportional to 245,619, 338,954.22 and 139,635 is: 192,696.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,619 : 338,954.22 = 139,635 : x
  2. Step 2: Convert to fraction form
    245,619/338,954.22 = 139,635/x
  3. Step 3: Cross multiply
    245,619x = 338,954.22 × 139,635
  4. Step 4: Simplify right side
    245,619x = 47,329,872,509.70
  5. Step 5: Solve for x
    x = 47,329,872,509.70/245,619
  6. Step 6: Final answer
    x = 192,696.30

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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.