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Finding the Fourth Proportional to 51.67, 71.88 and 50.68

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Solution

The fourth proportional to 51.67, 71.88 and 50.68 is: 70.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.67 : 71.88 = 50.68 : x
  2. Step 2: Convert to fraction form
    51.67/71.88 = 50.68/x
  3. Step 3: Cross multiply
    51.67x = 71.88 × 50.68
  4. Step 4: Simplify right side
    51.67x = 3,642.88
  5. Step 5: Solve for x
    x = 3,642.88/51.67
  6. Step 6: Final answer
    x = 70.50

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.