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Finding the Fourth Proportional to 192.02, 287.67 and 131.09

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Solution

The fourth proportional to 192.02, 287.67 and 131.09 is: 196.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.02 : 287.67 = 131.09 : x
  2. Step 2: Convert to fraction form
    192.02/287.67 = 131.09/x
  3. Step 3: Cross multiply
    192.02x = 287.67 × 131.09
  4. Step 4: Simplify right side
    192.02x = 37,710.66
  5. Step 5: Solve for x
    x = 37,710.66/192.02
  6. Step 6: Final answer
    x = 196.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.