Finding the Fourth Proportional to 86.26, 118.70 and 83.99
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Solution
The fourth proportional to 86.26, 118.70 and 83.99 is: 115.58
Step by Step Solution
- Step 1: Write the proportion equation
86.26 : 118.70 = 83.99 : x - Step 2: Convert to fraction form
86.26/118.70 = 83.99/x - Step 3: Cross multiply
86.26x = 118.70 × 83.99 - Step 4: Simplify right side
86.26x = 9,969.61 - Step 5: Solve for x
x = 9,969.61/86.26 - Step 6: Final answer
x = 115.58
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.