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Finding the Fourth Proportional to 172.16, 259.52 and 158.24

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Solution

The fourth proportional to 172.16, 259.52 and 158.24 is: 238.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.16 : 259.52 = 158.24 : x
  2. Step 2: Convert to fraction form
    172.16/259.52 = 158.24/x
  3. Step 3: Cross multiply
    172.16x = 259.52 × 158.24
  4. Step 4: Simplify right side
    172.16x = 41,066.44
  5. Step 5: Solve for x
    x = 41,066.44/172.16
  6. Step 6: Final answer
    x = 238.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.