Finding the Fourth Proportional to 79.65, 118.84 and 70.99
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Solution
The fourth proportional to 79.65, 118.84 and 70.99 is: 105.91
Step by Step Solution
- Step 1: Write the proportion equation
79.65 : 118.84 = 70.99 : x - Step 2: Convert to fraction form
79.65/118.84 = 70.99/x - Step 3: Cross multiply
79.65x = 118.84 × 70.99 - Step 4: Simplify right side
79.65x = 8,435.98 - Step 5: Solve for x
x = 8,435.98/79.65 - Step 6: Final answer
x = 105.91
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.