Finding the Fourth Proportional to 128.24, 192.28 and 55.08
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Solution
The fourth proportional to 128.24, 192.28 and 55.08 is: 82.59
Step by Step Solution
- Step 1: Write the proportion equation
128.24 : 192.28 = 55.08 : x - Step 2: Convert to fraction form
128.24/192.28 = 55.08/x - Step 3: Cross multiply
128.24x = 192.28 × 55.08 - Step 4: Simplify right side
128.24x = 10,590.78 - Step 5: Solve for x
x = 10,590.78/128.24 - Step 6: Final answer
x = 82.59
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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.