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Finding the Fourth Proportional to 188.21, 282.05 and 105.93

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Solution

The fourth proportional to 188.21, 282.05 and 105.93 is: 158.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.21 : 282.05 = 105.93 : x
  2. Step 2: Convert to fraction form
    188.21/282.05 = 105.93/x
  3. Step 3: Cross multiply
    188.21x = 282.05 × 105.93
  4. Step 4: Simplify right side
    188.21x = 29,877.42
  5. Step 5: Solve for x
    x = 29,877.42/188.21
  6. Step 6: Final answer
    x = 158.74

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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.