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Finding the Fourth Proportional to 90.49, 135.69 and 44.86

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Solution

The fourth proportional to 90.49, 135.69 and 44.86 is: 67.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.49 : 135.69 = 44.86 : x
  2. Step 2: Convert to fraction form
    90.49/135.69 = 44.86/x
  3. Step 3: Cross multiply
    90.49x = 135.69 × 44.86
  4. Step 4: Simplify right side
    90.49x = 6,086.37
  5. Step 5: Solve for x
    x = 6,086.37/90.49
  6. Step 6: Final answer
    x = 67.26

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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.