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Finding the Fourth Proportional to 189.83, 261.88 and 111.14

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Solution

The fourth proportional to 189.83, 261.88 and 111.14 is: 153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.83 : 261.88 = 111.14 : x
  2. Step 2: Convert to fraction form
    189.83/261.88 = 111.14/x
  3. Step 3: Cross multiply
    189.83x = 261.88 × 111.14
  4. Step 4: Simplify right side
    189.83x = 29,105.34
  5. Step 5: Solve for x
    x = 29,105.34/189.83
  6. Step 6: Final answer
    x = 153.32

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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.