Finding the Fourth Proportional to 129.70, 194.69 and 93.79
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Solution
The fourth proportional to 129.70, 194.69 and 93.79 is: 140.79
Step by Step Solution
- Step 1: Write the proportion equation
129.70 : 194.69 = 93.79 : x - Step 2: Convert to fraction form
129.70/194.69 = 93.79/x - Step 3: Cross multiply
129.70x = 194.69 × 93.79 - Step 4: Simplify right side
129.70x = 18,259.98 - Step 5: Solve for x
x = 18,259.98/129.70 - Step 6: Final answer
x = 140.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.