Finding the Fourth Proportional to 89.48, 122.93 and 86.09
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Solution
The fourth proportional to 89.48, 122.93 and 86.09 is: 118.27
Step by Step Solution
- Step 1: Write the proportion equation
89.48 : 122.93 = 86.09 : x - Step 2: Convert to fraction form
89.48/122.93 = 86.09/x - Step 3: Cross multiply
89.48x = 122.93 × 86.09 - Step 4: Simplify right side
89.48x = 10,583.04 - Step 5: Solve for x
x = 10,583.04/89.48 - Step 6: Final answer
x = 118.27
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.