Finding the Fourth Proportional to 79.19, 108.95 and 68.79
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Solution
The fourth proportional to 79.19, 108.95 and 68.79 is: 94.64
Step by Step Solution
- Step 1: Write the proportion equation
79.19 : 108.95 = 68.79 : x - Step 2: Convert to fraction form
79.19/108.95 = 68.79/x - Step 3: Cross multiply
79.19x = 108.95 × 68.79 - Step 4: Simplify right side
79.19x = 7,494.67 - Step 5: Solve for x
x = 7,494.67/79.19 - Step 6: Final answer
x = 94.64
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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.