Finding the Fourth Proportional to 84, 115.84 and 63.32
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Solution
The fourth proportional to 84, 115.84 and 63.32 is: 87.32
Step by Step Solution
- Step 1: Write the proportion equation
84 : 115.84 = 63.32 : x - Step 2: Convert to fraction form
84/115.84 = 63.32/x - Step 3: Cross multiply
84x = 115.84 × 63.32 - Step 4: Simplify right side
84x = 7,334.99 - Step 5: Solve for x
x = 7,334.99/84 - Step 6: Final answer
x = 87.32
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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.