Finding the Fourth Proportional to 86.64, 119.49 and 80.09
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Solution
The fourth proportional to 86.64, 119.49 and 80.09 is: 110.45
Step by Step Solution
- Step 1: Write the proportion equation
86.64 : 119.49 = 80.09 : x - Step 2: Convert to fraction form
86.64/119.49 = 80.09/x - Step 3: Cross multiply
86.64x = 119.49 × 80.09 - Step 4: Simplify right side
86.64x = 9,569.36 - Step 5: Solve for x
x = 9,569.36/86.64 - Step 6: Final answer
x = 110.45
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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.