Finding the Fourth Proportional to 78.93, 118.21 and 46.80
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Solution
The fourth proportional to 78.93, 118.21 and 46.80 is: 70.09
Step by Step Solution
- Step 1: Write the proportion equation
78.93 : 118.21 = 46.80 : x - Step 2: Convert to fraction form
78.93/118.21 = 46.80/x - Step 3: Cross multiply
78.93x = 118.21 × 46.80 - Step 4: Simplify right side
78.93x = 5,532.23 - Step 5: Solve for x
x = 5,532.23/78.93 - Step 6: Final answer
x = 70.09
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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.