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Finding the Fourth Proportional to 89.27, 133.67 and 64.79

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Solution

The fourth proportional to 89.27, 133.67 and 64.79 is: 97.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.27 : 133.67 = 64.79 : x
  2. Step 2: Convert to fraction form
    89.27/133.67 = 64.79/x
  3. Step 3: Cross multiply
    89.27x = 133.67 × 64.79
  4. Step 4: Simplify right side
    89.27x = 8,660.98
  5. Step 5: Solve for x
    x = 8,660.98/89.27
  6. Step 6: Final answer
    x = 97.03

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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.