Finding the Fourth Proportional to 84.68, 116.87 and 79.19
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Solution
The fourth proportional to 84.68, 116.87 and 79.19 is: 109.29
Step by Step Solution
- Step 1: Write the proportion equation
84.68 : 116.87 = 79.19 : x - Step 2: Convert to fraction form
84.68/116.87 = 79.19/x - Step 3: Cross multiply
84.68x = 116.87 × 79.19 - Step 4: Simplify right side
84.68x = 9,253.96 - Step 5: Solve for x
x = 9,253.96/84.68 - Step 6: Final answer
x = 109.29
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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.