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Finding the Fourth Proportional to 189.33, 261.23 and 114.65

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Solution

The fourth proportional to 189.33, 261.23 and 114.65 is: 158.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.33 : 261.23 = 114.65 : x
  2. Step 2: Convert to fraction form
    189.33/261.23 = 114.65/x
  3. Step 3: Cross multiply
    189.33x = 261.23 × 114.65
  4. Step 4: Simplify right side
    189.33x = 29,950.02
  5. Step 5: Solve for x
    x = 29,950.02/189.33
  6. Step 6: Final answer
    x = 158.19

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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.