Finding the Fourth Proportional to 84.20, 126 and 66.08
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Solution
The fourth proportional to 84.20, 126 and 66.08 is: 98.88
Step by Step Solution
- Step 1: Write the proportion equation
84.20 : 126 = 66.08 : x - Step 2: Convert to fraction form
84.20/126 = 66.08/x - Step 3: Cross multiply
84.20x = 126 × 66.08 - Step 4: Simplify right side
84.20x = 8,326.08 - Step 5: Solve for x
x = 8,326.08/84.20 - Step 6: Final answer
x = 98.88
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.