Finding the Fourth Proportional to 76.94, 115.44 and 68.91
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Solution
The fourth proportional to 76.94, 115.44 and 68.91 is: 103.39
Step by Step Solution
- Step 1: Write the proportion equation
76.94 : 115.44 = 68.91 : x - Step 2: Convert to fraction form
76.94/115.44 = 68.91/x - Step 3: Cross multiply
76.94x = 115.44 × 68.91 - Step 4: Simplify right side
76.94x = 7,954.97 - Step 5: Solve for x
x = 7,954.97/76.94 - Step 6: Final answer
x = 103.39
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.