Finding the Fourth Proportional to 144.48, 199.38 and 78.99
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Solution
The fourth proportional to 144.48, 199.38 and 78.99 is: 109.00
Step by Step Solution
- Step 1: Write the proportion equation
144.48 : 199.38 = 78.99 : x - Step 2: Convert to fraction form
144.48/199.38 = 78.99/x - Step 3: Cross multiply
144.48x = 199.38 × 78.99 - Step 4: Simplify right side
144.48x = 15,749.03 - Step 5: Solve for x
x = 15,749.03/144.48 - Step 6: Final answer
x = 109.00
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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.