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Finding the Fourth Proportional to 45.37, 67.74 and 36.12

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Solution

The fourth proportional to 45.37, 67.74 and 36.12 is: 53.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.37 : 67.74 = 36.12 : x
  2. Step 2: Convert to fraction form
    45.37/67.74 = 36.12/x
  3. Step 3: Cross multiply
    45.37x = 67.74 × 36.12
  4. Step 4: Simplify right side
    45.37x = 2,447.16
  5. Step 5: Solve for x
    x = 2,447.16/45.37
  6. Step 6: Final answer
    x = 53.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.