Finding the Fourth Proportional to 88.20, 121.73 and 63.63
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Solution
The fourth proportional to 88.20, 121.73 and 63.63 is: 87.82
Step by Step Solution
- Step 1: Write the proportion equation
88.20 : 121.73 = 63.63 : x - Step 2: Convert to fraction form
88.20/121.73 = 63.63/x - Step 3: Cross multiply
88.20x = 121.73 × 63.63 - Step 4: Simplify right side
88.20x = 7,745.36 - Step 5: Solve for x
x = 7,745.36/88.20 - Step 6: Final answer
x = 87.82
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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.