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Finding the Fourth Proportional to 136.81, 189.03 and 93.34

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Solution

The fourth proportional to 136.81, 189.03 and 93.34 is: 128.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.81 : 189.03 = 93.34 : x
  2. Step 2: Convert to fraction form
    136.81/189.03 = 93.34/x
  3. Step 3: Cross multiply
    136.81x = 189.03 × 93.34
  4. Step 4: Simplify right side
    136.81x = 17,644.06
  5. Step 5: Solve for x
    x = 17,644.06/136.81
  6. Step 6: Final answer
    x = 128.97

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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.