Finding the Fourth Proportional to 88,168.64, 121,683.84 and 54,639.68
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Solution
The fourth proportional to 88,168.64, 121,683.84 and 54,639.68 is: 75,409.65
Step by Step Solution
- Step 1: Write the proportion equation
88,168.64 : 121,683.84 = 54,639.68 : x - Step 2: Convert to fraction form
88,168.64/121,683.84 = 54,639.68/x - Step 3: Cross multiply
88,168.64x = 121,683.84 × 54,639.68 - Step 4: Simplify right side
88,168.64x = 6,648,766,078.77 - Step 5: Solve for x
x = 6,648,766,078.77/88,168.64 - Step 6: Final answer
x = 75,409.65
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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.