Finding the Fourth Proportional to 128,645.18, 177,616.98 and 80,320.68
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Solution
The fourth proportional to 128,645.18, 177,616.98 and 80,320.68 is: 110,896.62
Step by Step Solution
- Step 1: Write the proportion equation
128,645.18 : 177,616.98 = 80,320.68 : x - Step 2: Convert to fraction form
128,645.18/177,616.98 = 80,320.68/x - Step 3: Cross multiply
128,645.18x = 177,616.98 × 80,320.68 - Step 4: Simplify right side
128,645.18x = 14,266,315,323.46 - Step 5: Solve for x
x = 14,266,315,323.46/128,645.18 - Step 6: Final answer
x = 110,896.62
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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.