Finding the Fourth Proportional to 81,132.19, 121,639.95 and 36,736.09
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Solution
The fourth proportional to 81,132.19, 121,639.95 and 36,736.09 is: 55,077.72
Step by Step Solution
- Step 1: Write the proportion equation
81,132.19 : 121,639.95 = 36,736.09 : x - Step 2: Convert to fraction form
81,132.19/121,639.95 = 36,736.09/x - Step 3: Cross multiply
81,132.19x = 121,639.95 × 36,736.09 - Step 4: Simplify right side
81,132.19x = 4,468,576,150.80 - Step 5: Solve for x
x = 4,468,576,150.80/81,132.19 - Step 6: Final answer
x = 55,077.72
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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.