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Finding the Fourth Proportional to 199.53, 275.20 and 137.37

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Solution

The fourth proportional to 199.53, 275.20 and 137.37 is: 189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.53 : 275.20 = 137.37 : x
  2. Step 2: Convert to fraction form
    199.53/275.20 = 137.37/x
  3. Step 3: Cross multiply
    199.53x = 275.20 × 137.37
  4. Step 4: Simplify right side
    199.53x = 37,804.22
  5. Step 5: Solve for x
    x = 37,804.22/199.53
  6. Step 6: Final answer
    x = 189.47

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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.