Finding the Fourth Proportional to 86.41, 119.14 and 69.99
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Solution
The fourth proportional to 86.41, 119.14 and 69.99 is: 96.50
Step by Step Solution
- Step 1: Write the proportion equation
86.41 : 119.14 = 69.99 : x - Step 2: Convert to fraction form
86.41/119.14 = 69.99/x - Step 3: Cross multiply
86.41x = 119.14 × 69.99 - Step 4: Simplify right side
86.41x = 8,338.61 - Step 5: Solve for x
x = 8,338.61/86.41 - Step 6: Final answer
x = 96.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.