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Finding the Fourth Proportional to 68.93, 102.94 and 55.36

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Solution

The fourth proportional to 68.93, 102.94 and 55.36 is: 82.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.93 : 102.94 = 55.36 : x
  2. Step 2: Convert to fraction form
    68.93/102.94 = 55.36/x
  3. Step 3: Cross multiply
    68.93x = 102.94 × 55.36
  4. Step 4: Simplify right side
    68.93x = 5,698.76
  5. Step 5: Solve for x
    x = 5,698.76/68.93
  6. Step 6: Final answer
    x = 82.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.