Finding the Fourth Proportional to 84.48, 116.28 and 74.48
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Solution
The fourth proportional to 84.48, 116.28 and 74.48 is: 102.52
Step by Step Solution
- Step 1: Write the proportion equation
84.48 : 116.28 = 74.48 : x - Step 2: Convert to fraction form
84.48/116.28 = 74.48/x - Step 3: Cross multiply
84.48x = 116.28 × 74.48 - Step 4: Simplify right side
84.48x = 8,660.53 - Step 5: Solve for x
x = 8,660.53/84.48 - Step 6: Final answer
x = 102.52
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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.