Finding the Fourth Proportional to 134.91, 186.18 and 76.70
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Solution
The fourth proportional to 134.91, 186.18 and 76.70 is: 105.84
Step by Step Solution
- Step 1: Write the proportion equation
134.91 : 186.18 = 76.70 : x - Step 2: Convert to fraction form
134.91/186.18 = 76.70/x - Step 3: Cross multiply
134.91x = 186.18 × 76.70 - Step 4: Simplify right side
134.91x = 14,279.08 - Step 5: Solve for x
x = 14,279.08/134.91 - Step 6: Final answer
x = 105.84
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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.