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Finding the Fourth Proportional to 77.93, 107.56 and 48.81

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Solution

The fourth proportional to 77.93, 107.56 and 48.81 is: 67.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.93 : 107.56 = 48.81 : x
  2. Step 2: Convert to fraction form
    77.93/107.56 = 48.81/x
  3. Step 3: Cross multiply
    77.93x = 107.56 × 48.81
  4. Step 4: Simplify right side
    77.93x = 5,250.00
  5. Step 5: Solve for x
    x = 5,250.00/77.93
  6. Step 6: Final answer
    x = 67.37

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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.