Finding the Fourth Proportional to 128,371.23, 177,160.47 and 71,782.59
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Solution
The fourth proportional to 128,371.23, 177,160.47 and 71,782.59 is: 99,064.54
Step by Step Solution
- Step 1: Write the proportion equation
128,371.23 : 177,160.47 = 71,782.59 : x - Step 2: Convert to fraction form
128,371.23/177,160.47 = 71,782.59/x - Step 3: Cross multiply
128,371.23x = 177,160.47 × 71,782.59 - Step 4: Simplify right side
128,371.23x = 12,717,037,382.22 - Step 5: Solve for x
x = 12,717,037,382.22/128,371.23 - Step 6: Final answer
x = 99,064.54
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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.