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Finding the Fourth Proportional to 136.20, 187.74 and 94.69

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Solution

The fourth proportional to 136.20, 187.74 and 94.69 is: 130.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.20 : 187.74 = 94.69 : x
  2. Step 2: Convert to fraction form
    136.20/187.74 = 94.69/x
  3. Step 3: Cross multiply
    136.20x = 187.74 × 94.69
  4. Step 4: Simplify right side
    136.20x = 17,776.63
  5. Step 5: Solve for x
    x = 17,776.63/136.20
  6. Step 6: Final answer
    x = 130.52

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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.