Finding the Fourth Proportional to 98.79, 147.99 and 79.43
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Solution
The fourth proportional to 98.79, 147.99 and 79.43 is: 118.98
Step by Step Solution
- Step 1: Write the proportion equation
98.79 : 147.99 = 79.43 : x - Step 2: Convert to fraction form
98.79/147.99 = 79.43/x - Step 3: Cross multiply
98.79x = 147.99 × 79.43 - Step 4: Simplify right side
98.79x = 11,754.08 - Step 5: Solve for x
x = 11,754.08/98.79 - Step 6: Final answer
x = 118.98
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.