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Finding the Fourth Proportional to 189.33, 261.26 and 110.69

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Solution

The fourth proportional to 189.33, 261.26 and 110.69 is: 152.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.33 : 261.26 = 110.69 : x
  2. Step 2: Convert to fraction form
    189.33/261.26 = 110.69/x
  3. Step 3: Cross multiply
    189.33x = 261.26 × 110.69
  4. Step 4: Simplify right side
    189.33x = 28,918.40
  5. Step 5: Solve for x
    x = 28,918.40/189.33
  6. Step 6: Final answer
    x = 152.74

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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.