Finding the Fourth Proportional to 122.13, 183.21 and 45.13
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Solution
The fourth proportional to 122.13, 183.21 and 45.13 is: 67.70
Step by Step Solution
- Step 1: Write the proportion equation
122.13 : 183.21 = 45.13 : x - Step 2: Convert to fraction form
122.13/183.21 = 45.13/x - Step 3: Cross multiply
122.13x = 183.21 × 45.13 - Step 4: Simplify right side
122.13x = 8,268.24 - Step 5: Solve for x
x = 8,268.24/122.13 - Step 6: Final answer
x = 67.70
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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.