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Finding the Fourth Proportional to 189.08, 260.91 and 105.05

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Solution

The fourth proportional to 189.08, 260.91 and 105.05 is: 144.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.08 : 260.91 = 105.05 : x
  2. Step 2: Convert to fraction form
    189.08/260.91 = 105.05/x
  3. Step 3: Cross multiply
    189.08x = 260.91 × 105.05
  4. Step 4: Simplify right side
    189.08x = 27,409.25
  5. Step 5: Solve for x
    x = 27,409.25/189.08
  6. Step 6: Final answer
    x = 144.96

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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.