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Finding the Fourth Proportional to 188.27, 282.12 and 139.94

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Solution

The fourth proportional to 188.27, 282.12 and 139.94 is: 209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.27 : 282.12 = 139.94 : x
  2. Step 2: Convert to fraction form
    188.27/282.12 = 139.94/x
  3. Step 3: Cross multiply
    188.27x = 282.12 × 139.94
  4. Step 4: Simplify right side
    188.27x = 39,479.87
  5. Step 5: Solve for x
    x = 39,479.87/188.27
  6. Step 6: Final answer
    x = 209.70

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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.