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Finding the Fourth Proportional to 171.16, 235.91 and 150.31

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Solution

The fourth proportional to 171.16, 235.91 and 150.31 is: 207.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.16 : 235.91 = 150.31 : x
  2. Step 2: Convert to fraction form
    171.16/235.91 = 150.31/x
  3. Step 3: Cross multiply
    171.16x = 235.91 × 150.31
  4. Step 4: Simplify right side
    171.16x = 35,458.98
  5. Step 5: Solve for x
    x = 35,458.98/171.16
  6. Step 6: Final answer
    x = 207.16

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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.