Finding the Fourth Proportional to 142.55, 196.79 and 93.44
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Solution
The fourth proportional to 142.55, 196.79 and 93.44 is: 128.99
Step by Step Solution
- Step 1: Write the proportion equation
142.55 : 196.79 = 93.44 : x - Step 2: Convert to fraction form
142.55/196.79 = 93.44/x - Step 3: Cross multiply
142.55x = 196.79 × 93.44 - Step 4: Simplify right side
142.55x = 18,388.06 - Step 5: Solve for x
x = 18,388.06/142.55 - Step 6: Final answer
x = 128.99
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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.