Finding the Fourth Proportional to 79.44, 110.51 and 77.96
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Solution
The fourth proportional to 79.44, 110.51 and 77.96 is: 108.45
Step by Step Solution
- Step 1: Write the proportion equation
79.44 : 110.51 = 77.96 : x - Step 2: Convert to fraction form
79.44/110.51 = 77.96/x - Step 3: Cross multiply
79.44x = 110.51 × 77.96 - Step 4: Simplify right side
79.44x = 8,615.36 - Step 5: Solve for x
x = 8,615.36/79.44 - Step 6: Final answer
x = 108.45
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.