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Finding the Fourth Proportional to 188.44, 260.02 and 105.55

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Solution

The fourth proportional to 188.44, 260.02 and 105.55 is: 145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.44 : 260.02 = 105.55 : x
  2. Step 2: Convert to fraction form
    188.44/260.02 = 105.55/x
  3. Step 3: Cross multiply
    188.44x = 260.02 × 105.55
  4. Step 4: Simplify right side
    188.44x = 27,443.55
  5. Step 5: Solve for x
    x = 27,443.55/188.44
  6. Step 6: Final answer
    x = 145.64

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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.