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Finding the Fourth Proportional to 234,678.69, 323,912.61 and 139,240.71

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Solution

The fourth proportional to 234,678.69, 323,912.61 and 139,240.71 is: 192,185.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    234,678.69 : 323,912.61 = 139,240.71 : x
  2. Step 2: Convert to fraction form
    234,678.69/323,912.61 = 139,240.71/x
  3. Step 3: Cross multiply
    234,678.69x = 323,912.61 × 139,240.71
  4. Step 4: Simplify right side
    234,678.69x = 45,101,821,794.35
  5. Step 5: Solve for x
    x = 45,101,821,794.35/234,678.69
  6. Step 6: Final answer
    x = 192,185.42

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1.5x scale

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.