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Finding the Fourth Proportional to 51.68, 70.84 and 50.84

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Solution

The fourth proportional to 51.68, 70.84 and 50.84 is: 69.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.68 : 70.84 = 50.84 : x
  2. Step 2: Convert to fraction form
    51.68/70.84 = 50.84/x
  3. Step 3: Cross multiply
    51.68x = 70.84 × 50.84
  4. Step 4: Simplify right side
    51.68x = 3,601.51
  5. Step 5: Solve for x
    x = 3,601.51/51.68
  6. Step 6: Final answer
    x = 69.69

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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.