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Finding the Fourth Proportional to 172.91, 238.62 and 94.22

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Solution

The fourth proportional to 172.91, 238.62 and 94.22 is: 130.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.91 : 238.62 = 94.22 : x
  2. Step 2: Convert to fraction form
    172.91/238.62 = 94.22/x
  3. Step 3: Cross multiply
    172.91x = 238.62 × 94.22
  4. Step 4: Simplify right side
    172.91x = 22,482.31
  5. Step 5: Solve for x
    x = 22,482.31/172.91
  6. Step 6: Final answer
    x = 130.02

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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.