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Finding the Fourth Proportional to 50.09, 68.99 and 42.80

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Solution

The fourth proportional to 50.09, 68.99 and 42.80 is: 58.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.09 : 68.99 = 42.80 : x
  2. Step 2: Convert to fraction form
    50.09/68.99 = 42.80/x
  3. Step 3: Cross multiply
    50.09x = 68.99 × 42.80
  4. Step 4: Simplify right side
    50.09x = 2,952.21
  5. Step 5: Solve for x
    x = 2,952.21/50.09
  6. Step 6: Final answer
    x = 58.94

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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.