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Finding the Fourth Proportional to 50.16, 68.80 and 49.30

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Solution

The fourth proportional to 50.16, 68.80 and 49.30 is: 67.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.16 : 68.80 = 49.30 : x
  2. Step 2: Convert to fraction form
    50.16/68.80 = 49.30/x
  3. Step 3: Cross multiply
    50.16x = 68.80 × 49.30
  4. Step 4: Simplify right side
    50.16x = 3,391.84
  5. Step 5: Solve for x
    x = 3,391.84/50.16
  6. Step 6: Final answer
    x = 67.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.