Finding the Fourth Proportional to 163.79, 245.58 and 91.70
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Solution
The fourth proportional to 163.79, 245.58 and 91.70 is: 137.49
Step by Step Solution
- Step 1: Write the proportion equation
163.79 : 245.58 = 91.70 : x - Step 2: Convert to fraction form
163.79/245.58 = 91.70/x - Step 3: Cross multiply
163.79x = 245.58 × 91.70 - Step 4: Simplify right side
163.79x = 22,518.46 - Step 5: Solve for x
x = 22,518.46/163.79 - Step 6: Final answer
x = 137.49
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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.