Finding the Fourth Proportional to 128,360.70, 177,137.28 and 71,772.48
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Solution
The fourth proportional to 128,360.70, 177,137.28 and 71,772.48 is: 99,045.75
Step by Step Solution
- Step 1: Write the proportion equation
128,360.70 : 177,137.28 = 71,772.48 : x - Step 2: Convert to fraction form
128,360.70/177,137.28 = 71,772.48/x - Step 3: Cross multiply
128,360.70x = 177,137.28 × 71,772.48 - Step 4: Simplify right side
128,360.70x = 12,713,581,886.05 - Step 5: Solve for x
x = 12,713,581,886.05/128,360.70 - Step 6: Final answer
x = 99,045.75
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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.