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Finding the Fourth Proportional to 172.14, 237.78 and 135.24

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Solution

The fourth proportional to 172.14, 237.78 and 135.24 is: 186.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.14 : 237.78 = 135.24 : x
  2. Step 2: Convert to fraction form
    172.14/237.78 = 135.24/x
  3. Step 3: Cross multiply
    172.14x = 237.78 × 135.24
  4. Step 4: Simplify right side
    172.14x = 32,157.37
  5. Step 5: Solve for x
    x = 32,157.37/172.14
  6. Step 6: Final answer
    x = 186.81

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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.