Finding the Fourth Proportional to 88.44, 121.99 and 76.79
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Solution
The fourth proportional to 88.44, 121.99 and 76.79 is: 105.92
Step by Step Solution
- Step 1: Write the proportion equation
88.44 : 121.99 = 76.79 : x - Step 2: Convert to fraction form
88.44/121.99 = 76.79/x - Step 3: Cross multiply
88.44x = 121.99 × 76.79 - Step 4: Simplify right side
88.44x = 9,367.61 - Step 5: Solve for x
x = 9,367.61/88.44 - Step 6: Final answer
x = 105.92
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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.