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Finding the Fourth Proportional to 97.91, 147.21 and 94.67

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Solution

The fourth proportional to 97.91, 147.21 and 94.67 is: 142.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.91 : 147.21 = 94.67 : x
  2. Step 2: Convert to fraction form
    97.91/147.21 = 94.67/x
  3. Step 3: Cross multiply
    97.91x = 147.21 × 94.67
  4. Step 4: Simplify right side
    97.91x = 13,936.37
  5. Step 5: Solve for x
    x = 13,936.37/97.91
  6. Step 6: Final answer
    x = 142.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.