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Finding the Fourth Proportional to 192.71, 265.94 and 105.39

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Solution

The fourth proportional to 192.71, 265.94 and 105.39 is: 145.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.71 : 265.94 = 105.39 : x
  2. Step 2: Convert to fraction form
    192.71/265.94 = 105.39/x
  3. Step 3: Cross multiply
    192.71x = 265.94 × 105.39
  4. Step 4: Simplify right side
    192.71x = 28,027.68
  5. Step 5: Solve for x
    x = 28,027.68/192.71
  6. Step 6: Final answer
    x = 145.44

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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.