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Finding the Fourth Proportional to 186.42, 257.26 and 116.49

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Solution

The fourth proportional to 186.42, 257.26 and 116.49 is: 160.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.42 : 257.26 = 116.49 : x
  2. Step 2: Convert to fraction form
    186.42/257.26 = 116.49/x
  3. Step 3: Cross multiply
    186.42x = 257.26 × 116.49
  4. Step 4: Simplify right side
    186.42x = 29,968.22
  5. Step 5: Solve for x
    x = 29,968.22/186.42
  6. Step 6: Final answer
    x = 160.76

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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.