Finding the Fourth Proportional to 79.42, 118.94 and 76.68
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Solution
The fourth proportional to 79.42, 118.94 and 76.68 is: 114.84
Step by Step Solution
- Step 1: Write the proportion equation
79.42 : 118.94 = 76.68 : x - Step 2: Convert to fraction form
79.42/118.94 = 76.68/x - Step 3: Cross multiply
79.42x = 118.94 × 76.68 - Step 4: Simplify right side
79.42x = 9,120.51 - Step 5: Solve for x
x = 9,120.51/79.42 - Step 6: Final answer
x = 114.84
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.