Finding the Fourth Proportional to 97,872.21, 135,059.13 and 55,431.05
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Solution
The fourth proportional to 97,872.21, 135,059.13 and 55,431.05 is: 76,492.28
Step by Step Solution
- Step 1: Write the proportion equation
97,872.21 : 135,059.13 = 55,431.05 : x - Step 2: Convert to fraction form
97,872.21/135,059.13 = 55,431.05/x - Step 3: Cross multiply
97,872.21x = 135,059.13 × 55,431.05 - Step 4: Simplify right side
97,872.21x = 7,486,468,712.69 - Step 5: Solve for x
x = 7,486,468,712.69/97,872.21 - Step 6: Final answer
x = 76,492.28
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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.