Finding the Fourth Proportional to 139.48, 192.24 and 106.72
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Solution
The fourth proportional to 139.48, 192.24 and 106.72 is: 147.09
Step by Step Solution
- Step 1: Write the proportion equation
139.48 : 192.24 = 106.72 : x - Step 2: Convert to fraction form
139.48/192.24 = 106.72/x - Step 3: Cross multiply
139.48x = 192.24 × 106.72 - Step 4: Simplify right side
139.48x = 20,515.85 - Step 5: Solve for x
x = 20,515.85/139.48 - Step 6: Final answer
x = 147.09
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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.