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Finding the Fourth Proportional to 89.32, 123.11 and 68.58

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Solution

The fourth proportional to 89.32, 123.11 and 68.58 is: 94.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.32 : 123.11 = 68.58 : x
  2. Step 2: Convert to fraction form
    89.32/123.11 = 68.58/x
  3. Step 3: Cross multiply
    89.32x = 123.11 × 68.58
  4. Step 4: Simplify right side
    89.32x = 8,442.88
  5. Step 5: Solve for x
    x = 8,442.88/89.32
  6. Step 6: Final answer
    x = 94.52

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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.