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Finding the Fourth Proportional to 245,622, 338,958.36 and 139,638

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Solution

The fourth proportional to 245,622, 338,958.36 and 139,638 is: 192,700.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,622 : 338,958.36 = 139,638 : x
  2. Step 2: Convert to fraction form
    245,622/338,958.36 = 139,638/x
  3. Step 3: Cross multiply
    245,622x = 338,958.36 × 139,638
  4. Step 4: Simplify right side
    245,622x = 47,331,467,473.68
  5. Step 5: Solve for x
    x = 47,331,467,473.68/245,622
  6. Step 6: Final answer
    x = 192,700.44

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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.