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Finding the Fourth Proportional to 49.85, 68.80 and 36.08

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Solution

The fourth proportional to 49.85, 68.80 and 36.08 is: 49.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.85 : 68.80 = 36.08 : x
  2. Step 2: Convert to fraction form
    49.85/68.80 = 36.08/x
  3. Step 3: Cross multiply
    49.85x = 68.80 × 36.08
  4. Step 4: Simplify right side
    49.85x = 2,482.57
  5. Step 5: Solve for x
    x = 2,482.57/49.85
  6. Step 6: Final answer
    x = 49.80

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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.