Finding the Fourth Proportional to 88.99, 122.88 and 86.09
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Solution
The fourth proportional to 88.99, 122.88 and 86.09 is: 118.88
Step by Step Solution
- Step 1: Write the proportion equation
88.99 : 122.88 = 86.09 : x - Step 2: Convert to fraction form
88.99/122.88 = 86.09/x - Step 3: Cross multiply
88.99x = 122.88 × 86.09 - Step 4: Simplify right side
88.99x = 10,578.79 - Step 5: Solve for x
x = 10,578.79/88.99 - Step 6: Final answer
x = 118.88
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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.