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Finding the Fourth Proportional to 234,940.97, 324,071.06 and 139,380

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Solution

The fourth proportional to 234,940.97, 324,071.06 and 139,380 is: 192,256.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    234,940.97 : 324,071.06 = 139,380 : x
  2. Step 2: Convert to fraction form
    234,940.97/324,071.06 = 139,380/x
  3. Step 3: Cross multiply
    234,940.97x = 324,071.06 × 139,380
  4. Step 4: Simplify right side
    234,940.97x = 45,169,023,645.90
  5. Step 5: Solve for x
    x = 45,169,023,645.90/234,940.97
  6. Step 6: Final answer
    x = 192,256.91

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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.