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Finding the Fourth Proportional to 135.37, 186.78 and 80.08

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Solution

The fourth proportional to 135.37, 186.78 and 80.08 is: 110.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.37 : 186.78 = 80.08 : x
  2. Step 2: Convert to fraction form
    135.37/186.78 = 80.08/x
  3. Step 3: Cross multiply
    135.37x = 186.78 × 80.08
  4. Step 4: Simplify right side
    135.37x = 14,957.34
  5. Step 5: Solve for x
    x = 14,957.34/135.37
  6. Step 6: Final answer
    x = 110.49

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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.