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Finding the Fourth Proportional to 172.93, 238.52 and 107.45

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Solution

The fourth proportional to 172.93, 238.52 and 107.45 is: 148.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.93 : 238.52 = 107.45 : x
  2. Step 2: Convert to fraction form
    172.93/238.52 = 107.45/x
  3. Step 3: Cross multiply
    172.93x = 238.52 × 107.45
  4. Step 4: Simplify right side
    172.93x = 25,628.44
  5. Step 5: Solve for x
    x = 25,628.44/172.93
  6. Step 6: Final answer
    x = 148.21

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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.