Finding the Fourth Proportional to 135.21, 186.59 and 76.99
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Solution
The fourth proportional to 135.21, 186.59 and 76.99 is: 106.24
Step by Step Solution
- Step 1: Write the proportion equation
135.21 : 186.59 = 76.99 : x - Step 2: Convert to fraction form
135.21/186.59 = 76.99/x - Step 3: Cross multiply
135.21x = 186.59 × 76.99 - Step 4: Simplify right side
135.21x = 14,364.25 - Step 5: Solve for x
x = 14,364.25/135.21 - Step 6: Final answer
x = 106.24
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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.