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Finding the Fourth Proportional to 89.72, 134.54 and 44.03

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Solution

The fourth proportional to 89.72, 134.54 and 44.03 is: 66.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.72 : 134.54 = 44.03 : x
  2. Step 2: Convert to fraction form
    89.72/134.54 = 44.03/x
  3. Step 3: Cross multiply
    89.72x = 134.54 × 44.03
  4. Step 4: Simplify right side
    89.72x = 5,922.90
  5. Step 5: Solve for x
    x = 5,922.90/89.72
  6. Step 6: Final answer
    x = 66.02

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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.