Finding the Fourth Proportional to 81,431.31, 122,163.28 and 28,125.24
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Solution
The fourth proportional to 81,431.31, 122,163.28 and 28,125.24 is: 42,193.50
Step by Step Solution
- Step 1: Write the proportion equation
81,431.31 : 122,163.28 = 28,125.24 : x - Step 2: Convert to fraction form
81,431.31/122,163.28 = 28,125.24/x - Step 3: Cross multiply
81,431.31x = 122,163.28 × 28,125.24 - Step 4: Simplify right side
81,431.31x = 3,435,871,886.13 - Step 5: Solve for x
x = 3,435,871,886.13/81,431.31 - Step 6: Final answer
x = 42,193.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.