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Finding the Fourth Proportional to 90.23, 135.41 and 49.73

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Solution

The fourth proportional to 90.23, 135.41 and 49.73 is: 74.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.23 : 135.41 = 49.73 : x
  2. Step 2: Convert to fraction form
    90.23/135.41 = 49.73/x
  3. Step 3: Cross multiply
    90.23x = 135.41 × 49.73
  4. Step 4: Simplify right side
    90.23x = 6,733.01
  5. Step 5: Solve for x
    x = 6,733.01/90.23
  6. Step 6: Final answer
    x = 74.62

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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.