Finding the Fourth Proportional to 129.70, 194.14 and 68.68
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Solution
The fourth proportional to 129.70, 194.14 and 68.68 is: 102.80
Step by Step Solution
- Step 1: Write the proportion equation
129.70 : 194.14 = 68.68 : x - Step 2: Convert to fraction form
129.70/194.14 = 68.68/x - Step 3: Cross multiply
129.70x = 194.14 × 68.68 - Step 4: Simplify right side
129.70x = 13,332.22 - Step 5: Solve for x
x = 13,332.22/129.70 - Step 6: Final answer
x = 102.80
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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.