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Finding the Fourth Proportional to 49.67, 68.62 and 42.84

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Solution

The fourth proportional to 49.67, 68.62 and 42.84 is: 59.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.67 : 68.62 = 42.84 : x
  2. Step 2: Convert to fraction form
    49.67/68.62 = 42.84/x
  3. Step 3: Cross multiply
    49.67x = 68.62 × 42.84
  4. Step 4: Simplify right side
    49.67x = 2,939.57
  5. Step 5: Solve for x
    x = 2,939.57/49.67
  6. Step 6: Final answer
    x = 59.18

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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.