Finding the Fourth Proportional to 81,264.36, 121,546.62 and 72,321.96
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Solution
The fourth proportional to 81,264.36, 121,546.62 and 72,321.96 is: 108,171.53
Step by Step Solution
- Step 1: Write the proportion equation
81,264.36 : 121,546.62 = 72,321.96 : x - Step 2: Convert to fraction form
81,264.36/121,546.62 = 72,321.96/x - Step 3: Cross multiply
81,264.36x = 121,546.62 × 72,321.96 - Step 4: Simplify right side
81,264.36x = 8,790,489,789.78 - Step 5: Solve for x
x = 8,790,489,789.78/81,264.36 - Step 6: Final answer
x = 108,171.53
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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.