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Finding the Fourth Proportional to 134.18, 185.16 and 90.44

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Solution

The fourth proportional to 134.18, 185.16 and 90.44 is: 124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.18 : 185.16 = 90.44 : x
  2. Step 2: Convert to fraction form
    134.18/185.16 = 90.44/x
  3. Step 3: Cross multiply
    134.18x = 185.16 × 90.44
  4. Step 4: Simplify right side
    134.18x = 16,745.87
  5. Step 5: Solve for x
    x = 16,745.87/134.18
  6. Step 6: Final answer
    x = 124.80

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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.