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Finding the Fourth Proportional to 186.84, 257.86 and 116.92

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Solution

The fourth proportional to 186.84, 257.86 and 116.92 is: 161.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.84 : 257.86 = 116.92 : x
  2. Step 2: Convert to fraction form
    186.84/257.86 = 116.92/x
  3. Step 3: Cross multiply
    186.84x = 257.86 × 116.92
  4. Step 4: Simplify right side
    186.84x = 30,148.99
  5. Step 5: Solve for x
    x = 30,148.99/186.84
  6. Step 6: Final answer
    x = 161.36

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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.