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Finding the Fourth Proportional to 89.32, 133.82 and 46.60

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Solution

The fourth proportional to 89.32, 133.82 and 46.60 is: 69.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.32 : 133.82 = 46.60 : x
  2. Step 2: Convert to fraction form
    89.32/133.82 = 46.60/x
  3. Step 3: Cross multiply
    89.32x = 133.82 × 46.60
  4. Step 4: Simplify right side
    89.32x = 6,236.01
  5. Step 5: Solve for x
    x = 6,236.01/89.32
  6. Step 6: Final answer
    x = 69.82

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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.