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Finding the Fourth Proportional to 66.37, 91.62 and 41.81

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Solution

The fourth proportional to 66.37, 91.62 and 41.81 is: 57.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.37 : 91.62 = 41.81 : x
  2. Step 2: Convert to fraction form
    66.37/91.62 = 41.81/x
  3. Step 3: Cross multiply
    66.37x = 91.62 × 41.81
  4. Step 4: Simplify right side
    66.37x = 3,830.63
  5. Step 5: Solve for x
    x = 3,830.63/66.37
  6. Step 6: Final answer
    x = 57.72

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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.