Finding the Fourth Proportional to 134.24, 185.21 and 78.99
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Solution
The fourth proportional to 134.24, 185.21 and 78.99 is: 108.98
Step by Step Solution
- Step 1: Write the proportion equation
134.24 : 185.21 = 78.99 : x - Step 2: Convert to fraction form
134.24/185.21 = 78.99/x - Step 3: Cross multiply
134.24x = 185.21 × 78.99 - Step 4: Simplify right side
134.24x = 14,629.99 - Step 5: Solve for x
x = 14,629.99/134.24 - Step 6: Final answer
x = 108.98
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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.