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Finding the Fourth Proportional to 157.33, 217.25 and 131.59

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Solution

The fourth proportional to 157.33, 217.25 and 131.59 is: 181.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.33 : 217.25 = 131.59 : x
  2. Step 2: Convert to fraction form
    157.33/217.25 = 131.59/x
  3. Step 3: Cross multiply
    157.33x = 217.25 × 131.59
  4. Step 4: Simplify right side
    157.33x = 28,587.93
  5. Step 5: Solve for x
    x = 28,587.93/157.33
  6. Step 6: Final answer
    x = 181.71

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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.