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Finding the Fourth Proportional to 189.14, 260.87 and 114.45

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Solution

The fourth proportional to 189.14, 260.87 and 114.45 is: 157.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.14 : 260.87 = 114.45 : x
  2. Step 2: Convert to fraction form
    189.14/260.87 = 114.45/x
  3. Step 3: Cross multiply
    189.14x = 260.87 × 114.45
  4. Step 4: Simplify right side
    189.14x = 29,855.66
  5. Step 5: Solve for x
    x = 29,855.66/189.14
  6. Step 6: Final answer
    x = 157.85

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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.