Finding the Fourth Proportional to 163.60, 245.70 and 129.70
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Solution
The fourth proportional to 163.60, 245.70 and 129.70 is: 194.79
Step by Step Solution
- Step 1: Write the proportion equation
163.60 : 245.70 = 129.70 : x - Step 2: Convert to fraction form
163.60/245.70 = 129.70/x - Step 3: Cross multiply
163.60x = 245.70 × 129.70 - Step 4: Simplify right side
163.60x = 31,867.29 - Step 5: Solve for x
x = 31,867.29/163.60 - Step 6: Final answer
x = 194.79
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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.