Finding the Fourth Proportional to 84.11, 125.42 and 74.99
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Solution
The fourth proportional to 84.11, 125.42 and 74.99 is: 111.83
Step by Step Solution
- Step 1: Write the proportion equation
84.11 : 125.42 = 74.99 : x - Step 2: Convert to fraction form
84.11/125.42 = 74.99/x - Step 3: Cross multiply
84.11x = 125.42 × 74.99 - Step 4: Simplify right side
84.11x = 9,405.18 - Step 5: Solve for x
x = 9,405.18/84.11 - Step 6: Final answer
x = 111.83
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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.