Finding the Fourth Proportional to 102,486.42, 141,431.49 and 57,163.28
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Solution
The fourth proportional to 102,486.42, 141,431.49 and 57,163.28 is: 78,885.45
Step by Step Solution
- Step 1: Write the proportion equation
102,486.42 : 141,431.49 = 57,163.28 : x - Step 2: Convert to fraction form
102,486.42/141,431.49 = 57,163.28/x - Step 3: Cross multiply
102,486.42x = 141,431.49 × 57,163.28 - Step 4: Simplify right side
102,486.42x = 8,084,687,156.53 - Step 5: Solve for x
x = 8,084,687,156.53/102,486.42 - Step 6: Final answer
x = 78,885.45
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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.