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Finding the Fourth Proportional to 172.75, 238.49 and 114.70

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Solution

The fourth proportional to 172.75, 238.49 and 114.70 is: 158.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.75 : 238.49 = 114.70 : x
  2. Step 2: Convert to fraction form
    172.75/238.49 = 114.70/x
  3. Step 3: Cross multiply
    172.75x = 238.49 × 114.70
  4. Step 4: Simplify right side
    172.75x = 27,354.80
  5. Step 5: Solve for x
    x = 27,354.80/172.75
  6. Step 6: Final answer
    x = 158.35

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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.