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Finding the Fourth Proportional to 171.04, 235.91 and 131.65

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Solution

The fourth proportional to 171.04, 235.91 and 131.65 is: 181.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.04 : 235.91 = 131.65 : x
  2. Step 2: Convert to fraction form
    171.04/235.91 = 131.65/x
  3. Step 3: Cross multiply
    171.04x = 235.91 × 131.65
  4. Step 4: Simplify right side
    171.04x = 31,057.55
  5. Step 5: Solve for x
    x = 31,057.55/171.04
  6. Step 6: Final answer
    x = 181.58

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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.