Finding the Fourth Proportional to 84.12, 125.96 and 68.84
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Solution
The fourth proportional to 84.12, 125.96 and 68.84 is: 103.08
Step by Step Solution
- Step 1: Write the proportion equation
84.12 : 125.96 = 68.84 : x - Step 2: Convert to fraction form
84.12/125.96 = 68.84/x - Step 3: Cross multiply
84.12x = 125.96 × 68.84 - Step 4: Simplify right side
84.12x = 8,671.09 - Step 5: Solve for x
x = 8,671.09/84.12 - Step 6: Final answer
x = 103.08
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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.