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Finding the Fourth Proportional to 189.48, 261.47 and 119.55

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Solution

The fourth proportional to 189.48, 261.47 and 119.55 is: 164.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.48 : 261.47 = 119.55 : x
  2. Step 2: Convert to fraction form
    189.48/261.47 = 119.55/x
  3. Step 3: Cross multiply
    189.48x = 261.47 × 119.55
  4. Step 4: Simplify right side
    189.48x = 31,256.83
  5. Step 5: Solve for x
    x = 31,256.83/189.48
  6. Step 6: Final answer
    x = 164.97

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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.