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Finding the Fourth Proportional to 88.54, 122.07 and 66.67

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Solution

The fourth proportional to 88.54, 122.07 and 66.67 is: 91.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.54 : 122.07 = 66.67 : x
  2. Step 2: Convert to fraction form
    88.54/122.07 = 66.67/x
  3. Step 3: Cross multiply
    88.54x = 122.07 × 66.67
  4. Step 4: Simplify right side
    88.54x = 8,138.41
  5. Step 5: Solve for x
    x = 8,138.41/88.54
  6. Step 6: Final answer
    x = 91.92

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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.