Finding the Fourth Proportional to 128,845.29, 177,806.16 and 72,257.88
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Solution
The fourth proportional to 128,845.29, 177,806.16 and 72,257.88 is: 99,715.68
Step by Step Solution
- Step 1: Write the proportion equation
128,845.29 : 177,806.16 = 72,257.88 : x - Step 2: Convert to fraction form
128,845.29/177,806.16 = 72,257.88/x - Step 3: Cross multiply
128,845.29x = 177,806.16 × 72,257.88 - Step 4: Simplify right side
128,845.29x = 12,847,896,172.54 - Step 5: Solve for x
x = 12,847,896,172.54/128,845.29 - Step 6: Final answer
x = 99,715.68
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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.