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Finding the Fourth Proportional to 89.37, 122.99 and 68.56

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Solution

The fourth proportional to 89.37, 122.99 and 68.56 is: 94.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.37 : 122.99 = 68.56 : x
  2. Step 2: Convert to fraction form
    89.37/122.99 = 68.56/x
  3. Step 3: Cross multiply
    89.37x = 122.99 × 68.56
  4. Step 4: Simplify right side
    89.37x = 8,431.54
  5. Step 5: Solve for x
    x = 8,431.54/89.37
  6. Step 6: Final answer
    x = 94.34

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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.