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Finding the Fourth Proportional to 66.23, 91.81 and 63.67

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Solution

The fourth proportional to 66.23, 91.81 and 63.67 is: 88.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.23 : 91.81 = 63.67 : x
  2. Step 2: Convert to fraction form
    66.23/91.81 = 63.67/x
  3. Step 3: Cross multiply
    66.23x = 91.81 × 63.67
  4. Step 4: Simplify right side
    66.23x = 5,845.08
  5. Step 5: Solve for x
    x = 5,845.08/66.23
  6. Step 6: Final answer
    x = 88.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.