Finding the Fourth Proportional to 76.44, 114.70 and 57.18
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Solution
The fourth proportional to 76.44, 114.70 and 57.18 is: 85.80
Step by Step Solution
- Step 1: Write the proportion equation
76.44 : 114.70 = 57.18 : x - Step 2: Convert to fraction form
76.44/114.70 = 57.18/x - Step 3: Cross multiply
76.44x = 114.70 × 57.18 - Step 4: Simplify right side
76.44x = 6,558.55 - Step 5: Solve for x
x = 6,558.55/76.44 - Step 6: Final answer
x = 85.80
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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.