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Finding the Fourth Proportional to 172.01, 257.81 and 120.37

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Solution

The fourth proportional to 172.01, 257.81 and 120.37 is: 180.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.01 : 257.81 = 120.37 : x
  2. Step 2: Convert to fraction form
    172.01/257.81 = 120.37/x
  3. Step 3: Cross multiply
    172.01x = 257.81 × 120.37
  4. Step 4: Simplify right side
    172.01x = 31,032.59
  5. Step 5: Solve for x
    x = 31,032.59/172.01
  6. Step 6: Final answer
    x = 180.41

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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.