Finding the Fourth Proportional to 122.40, 183.36 and 117.12
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Solution
The fourth proportional to 122.40, 183.36 and 117.12 is: 175.45
Step by Step Solution
- Step 1: Write the proportion equation
122.40 : 183.36 = 117.12 : x - Step 2: Convert to fraction form
122.40/183.36 = 117.12/x - Step 3: Cross multiply
122.40x = 183.36 × 117.12 - Step 4: Simplify right side
122.40x = 21,475.12 - Step 5: Solve for x
x = 21,475.12/122.40 - Step 6: Final answer
x = 175.45
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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.