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Finding the Fourth Proportional to 189.16, 261.03 and 141.87

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Solution

The fourth proportional to 189.16, 261.03 and 141.87 is: 195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.16 : 261.03 = 141.87 : x
  2. Step 2: Convert to fraction form
    189.16/261.03 = 141.87/x
  3. Step 3: Cross multiply
    189.16x = 261.03 × 141.87
  4. Step 4: Simplify right side
    189.16x = 37,033.84
  5. Step 5: Solve for x
    x = 37,033.84/189.16
  6. Step 6: Final answer
    x = 195.78

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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.