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Finding the Fourth Proportional to 89.99, 135.03 and 44.31

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Solution

The fourth proportional to 89.99, 135.03 and 44.31 is: 66.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.99 : 135.03 = 44.31 : x
  2. Step 2: Convert to fraction form
    89.99/135.03 = 44.31/x
  3. Step 3: Cross multiply
    89.99x = 135.03 × 44.31
  4. Step 4: Simplify right side
    89.99x = 5,983.18
  5. Step 5: Solve for x
    x = 5,983.18/89.99
  6. Step 6: Final answer
    x = 66.49

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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.