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Finding the Fourth Proportional to 251,940.81, 347,678.32 and 138,763.56

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Solution

The fourth proportional to 251,940.81, 347,678.32 and 138,763.56 is: 191,493.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,940.81 : 347,678.32 = 138,763.56 : x
  2. Step 2: Convert to fraction form
    251,940.81/347,678.32 = 138,763.56/x
  3. Step 3: Cross multiply
    251,940.81x = 347,678.32 × 138,763.56
  4. Step 4: Simplify right side
    251,940.81x = 48,245,081,591.47
  5. Step 5: Solve for x
    x = 48,245,081,591.47/251,940.81
  6. Step 6: Final answer
    x = 191,493.71

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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.