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Finding the Fourth Proportional to 50.99, 76.50 and 18.50

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Solution

The fourth proportional to 50.99, 76.50 and 18.50 is: 27.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.99 : 76.50 = 18.50 : x
  2. Step 2: Convert to fraction form
    50.99/76.50 = 18.50/x
  3. Step 3: Cross multiply
    50.99x = 76.50 × 18.50
  4. Step 4: Simplify right side
    50.99x = 1,415.25
  5. Step 5: Solve for x
    x = 1,415.25/50.99
  6. Step 6: Final answer
    x = 27.76

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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.