Finding the Fourth Proportional to 79.74, 118.95 and 70.44
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Solution
The fourth proportional to 79.74, 118.95 and 70.44 is: 105.08
Step by Step Solution
- Step 1: Write the proportion equation
79.74 : 118.95 = 70.44 : x - Step 2: Convert to fraction form
79.74/118.95 = 70.44/x - Step 3: Cross multiply
79.74x = 118.95 × 70.44 - Step 4: Simplify right side
79.74x = 8,378.84 - Step 5: Solve for x
x = 8,378.84/79.74 - Step 6: Final answer
x = 105.08
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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.