Finding the Fourth Proportional to 154.08, 212.88 and 139.44
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Solution
The fourth proportional to 154.08, 212.88 and 139.44 is: 192.65
Step by Step Solution
- Step 1: Write the proportion equation
154.08 : 212.88 = 139.44 : x - Step 2: Convert to fraction form
154.08/212.88 = 139.44/x - Step 3: Cross multiply
154.08x = 212.88 × 139.44 - Step 4: Simplify right side
154.08x = 29,683.99 - Step 5: Solve for x
x = 29,683.99/154.08 - Step 6: Final answer
x = 192.65
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.