Finding the Fourth Proportional to 128,661.63, 177,553.47 and 71,301.90
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Solution
The fourth proportional to 128,661.63, 177,553.47 and 71,301.90 is: 98,396.86
Step by Step Solution
- Step 1: Write the proportion equation
128,661.63 : 177,553.47 = 71,301.90 : x - Step 2: Convert to fraction form
128,661.63/177,553.47 = 71,301.90/x - Step 3: Cross multiply
128,661.63x = 177,553.47 × 71,301.90 - Step 4: Simplify right side
128,661.63x = 12,659,899,762.59 - Step 5: Solve for x
x = 12,659,899,762.59/128,661.63 - Step 6: Final answer
x = 98,396.86
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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.