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Finding the Fourth Proportional to 136.66, 189.37 and 134.99

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Solution

The fourth proportional to 136.66, 189.37 and 134.99 is: 187.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.66 : 189.37 = 134.99 : x
  2. Step 2: Convert to fraction form
    136.66/189.37 = 134.99/x
  3. Step 3: Cross multiply
    136.66x = 189.37 × 134.99
  4. Step 4: Simplify right side
    136.66x = 25,563.06
  5. Step 5: Solve for x
    x = 25,563.06/136.66
  6. Step 6: Final answer
    x = 187.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.