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Finding the Fourth Proportional to 135.55, 186.59 and 131.11

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Solution

The fourth proportional to 135.55, 186.59 and 131.11 is: 180.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.55 : 186.59 = 131.11 : x
  2. Step 2: Convert to fraction form
    135.55/186.59 = 131.11/x
  3. Step 3: Cross multiply
    135.55x = 186.59 × 131.11
  4. Step 4: Simplify right side
    135.55x = 24,463.68
  5. Step 5: Solve for x
    x = 24,463.68/135.55
  6. Step 6: Final answer
    x = 180.48

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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.