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Finding the Fourth Proportional to 171.99, 237.57 and 139.64

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Solution

The fourth proportional to 171.99, 237.57 and 139.64 is: 192.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.99 : 237.57 = 139.64 : x
  2. Step 2: Convert to fraction form
    171.99/237.57 = 139.64/x
  3. Step 3: Cross multiply
    171.99x = 237.57 × 139.64
  4. Step 4: Simplify right side
    171.99x = 33,172.56
  5. Step 5: Solve for x
    x = 33,172.56/171.99
  6. Step 6: Final answer
    x = 192.87

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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.