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Finding the Fourth Proportional to 48.50, 67.28 and 47.69

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Solution

The fourth proportional to 48.50, 67.28 and 47.69 is: 66.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.50 : 67.28 = 47.69 : x
  2. Step 2: Convert to fraction form
    48.50/67.28 = 47.69/x
  3. Step 3: Cross multiply
    48.50x = 67.28 × 47.69
  4. Step 4: Simplify right side
    48.50x = 3,208.53
  5. Step 5: Solve for x
    x = 3,208.53/48.50
  6. Step 6: Final answer
    x = 66.16

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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.