Finding the Fourth Proportional to 98.00, 135.18 and 78.31
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Solution
The fourth proportional to 98.00, 135.18 and 78.31 is: 108.02
Step by Step Solution
- Step 1: Write the proportion equation
98.00 : 135.18 = 78.31 : x - Step 2: Convert to fraction form
98.00/135.18 = 78.31/x - Step 3: Cross multiply
98.00x = 135.18 × 78.31 - Step 4: Simplify right side
98.00x = 10,585.88 - Step 5: Solve for x
x = 10,585.88/98.00 - Step 6: Final answer
x = 108.02
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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.