Finding the Fourth Proportional to 89.30, 122.41 and 88.09
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Solution
The fourth proportional to 89.30, 122.41 and 88.09 is: 120.75
Step by Step Solution
- Step 1: Write the proportion equation
89.30 : 122.41 = 88.09 : x - Step 2: Convert to fraction form
89.30/122.41 = 88.09/x - Step 3: Cross multiply
89.30x = 122.41 × 88.09 - Step 4: Simplify right side
89.30x = 10,782.90 - Step 5: Solve for x
x = 10,782.90/89.30 - Step 6: Final answer
x = 120.75
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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.