Finding the Fourth Proportional to 138.63, 207.95 and 73.67
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Solution
The fourth proportional to 138.63, 207.95 and 73.67 is: 110.50
Step by Step Solution
- Step 1: Write the proportion equation
138.63 : 207.95 = 73.67 : x - Step 2: Convert to fraction form
138.63/207.95 = 73.67/x - Step 3: Cross multiply
138.63x = 207.95 × 73.67 - Step 4: Simplify right side
138.63x = 15,318.68 - Step 5: Solve for x
x = 15,318.68/138.63 - Step 6: Final answer
x = 110.50
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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.