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Finding the Fourth Proportional to 172.05, 237.31 and 125.58

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Solution

The fourth proportional to 172.05, 237.31 and 125.58 is: 173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.05 : 237.31 = 125.58 : x
  2. Step 2: Convert to fraction form
    172.05/237.31 = 125.58/x
  3. Step 3: Cross multiply
    172.05x = 237.31 × 125.58
  4. Step 4: Simplify right side
    172.05x = 29,800.76
  5. Step 5: Solve for x
    x = 29,800.76/172.05
  6. Step 6: Final answer
    x = 173.21

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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.