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Finding the Fourth Proportional to 172.10, 237.18 and 125.38

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Solution

The fourth proportional to 172.10, 237.18 and 125.38 is: 172.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.10 : 237.18 = 125.38 : x
  2. Step 2: Convert to fraction form
    172.10/237.18 = 125.38/x
  3. Step 3: Cross multiply
    172.10x = 237.18 × 125.38
  4. Step 4: Simplify right side
    172.10x = 29,737.63
  5. Step 5: Solve for x
    x = 29,737.63/172.10
  6. Step 6: Final answer
    x = 172.79

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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.