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Finding the Fourth Proportional to 89.55, 124.11 and 88.32

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Solution

The fourth proportional to 89.55, 124.11 and 88.32 is: 122.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.55 : 124.11 = 88.32 : x
  2. Step 2: Convert to fraction form
    89.55/124.11 = 88.32/x
  3. Step 3: Cross multiply
    89.55x = 124.11 × 88.32
  4. Step 4: Simplify right side
    89.55x = 10,961.40
  5. Step 5: Solve for x
    x = 10,961.40/89.55
  6. Step 6: Final answer
    x = 122.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.