Finding the Fourth Proportional to 86.09, 118.82 and 58.53
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Solution
The fourth proportional to 86.09, 118.82 and 58.53 is: 80.78
Step by Step Solution
- Step 1: Write the proportion equation
86.09 : 118.82 = 58.53 : x - Step 2: Convert to fraction form
86.09/118.82 = 58.53/x - Step 3: Cross multiply
86.09x = 118.82 × 58.53 - Step 4: Simplify right side
86.09x = 6,954.24 - Step 5: Solve for x
x = 6,954.24/86.09 - Step 6: Final answer
x = 80.78
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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.