Finding the Fourth Proportional to 98.51, 135.99 and 63.09
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Solution
The fourth proportional to 98.51, 135.99 and 63.09 is: 87.10
Step by Step Solution
- Step 1: Write the proportion equation
98.51 : 135.99 = 63.09 : x - Step 2: Convert to fraction form
98.51/135.99 = 63.09/x - Step 3: Cross multiply
98.51x = 135.99 × 63.09 - Step 4: Simplify right side
98.51x = 8,579.61 - Step 5: Solve for x
x = 8,579.61/98.51 - Step 6: Final answer
x = 87.10
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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.