Finding the Fourth Proportional to 89.92, 124.14 and 86.05
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Solution
The fourth proportional to 89.92, 124.14 and 86.05 is: 118.80
Step by Step Solution
- Step 1: Write the proportion equation
89.92 : 124.14 = 86.05 : x - Step 2: Convert to fraction form
89.92/124.14 = 86.05/x - Step 3: Cross multiply
89.92x = 124.14 × 86.05 - Step 4: Simplify right side
89.92x = 10,682.25 - Step 5: Solve for x
x = 10,682.25/89.92 - Step 6: Final answer
x = 118.80
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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.