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Finding the Fourth Proportional to 186.35, 279.21 and 113.18

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Solution

The fourth proportional to 186.35, 279.21 and 113.18 is: 169.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.35 : 279.21 = 113.18 : x
  2. Step 2: Convert to fraction form
    186.35/279.21 = 113.18/x
  3. Step 3: Cross multiply
    186.35x = 279.21 × 113.18
  4. Step 4: Simplify right side
    186.35x = 31,600.99
  5. Step 5: Solve for x
    x = 31,600.99/186.35
  6. Step 6: Final answer
    x = 169.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.