Finding the Fourth Proportional to 95.40, 142.80 and 74.82
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Solution
The fourth proportional to 95.40, 142.80 and 74.82 is: 111.99
Step by Step Solution
- Step 1: Write the proportion equation
95.40 : 142.80 = 74.82 : x - Step 2: Convert to fraction form
95.40/142.80 = 74.82/x - Step 3: Cross multiply
95.40x = 142.80 × 74.82 - Step 4: Simplify right side
95.40x = 10,684.30 - Step 5: Solve for x
x = 10,684.30/95.40 - Step 6: Final answer
x = 111.99
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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.