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Finding the Fourth Proportional to 188.45, 282.29 and 111.18

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Solution

The fourth proportional to 188.45, 282.29 and 111.18 is: 166.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.45 : 282.29 = 111.18 : x
  2. Step 2: Convert to fraction form
    188.45/282.29 = 111.18/x
  3. Step 3: Cross multiply
    188.45x = 282.29 × 111.18
  4. Step 4: Simplify right side
    188.45x = 31,386.13
  5. Step 5: Solve for x
    x = 31,386.13/188.45
  6. Step 6: Final answer
    x = 166.54

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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.