Finding the Fourth Proportional to 98.13, 135.36 and 63.18
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Solution
The fourth proportional to 98.13, 135.36 and 63.18 is: 87.15
Step by Step Solution
- Step 1: Write the proportion equation
98.13 : 135.36 = 63.18 : x - Step 2: Convert to fraction form
98.13/135.36 = 63.18/x - Step 3: Cross multiply
98.13x = 135.36 × 63.18 - Step 4: Simplify right side
98.13x = 8,552.04 - Step 5: Solve for x
x = 8,552.04/98.13 - Step 6: Final answer
x = 87.15
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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.