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Finding the Fourth Proportional to 188.87, 260.87 and 126.61

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Solution

The fourth proportional to 188.87, 260.87 and 126.61 is: 174.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.87 : 260.87 = 126.61 : x
  2. Step 2: Convert to fraction form
    188.87/260.87 = 126.61/x
  3. Step 3: Cross multiply
    188.87x = 260.87 × 126.61
  4. Step 4: Simplify right side
    188.87x = 33,026.81
  5. Step 5: Solve for x
    x = 33,026.81/188.87
  6. Step 6: Final answer
    x = 174.87

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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.