Finding the Fourth Proportional to 128,628.45, 177,447.99 and 83,321.49
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Solution
The fourth proportional to 128,628.45, 177,447.99 and 83,321.49 is: 114,945.26
Step by Step Solution
- Step 1: Write the proportion equation
128,628.45 : 177,447.99 = 83,321.49 : x - Step 2: Convert to fraction form
128,628.45/177,447.99 = 83,321.49/x - Step 3: Cross multiply
128,628.45x = 177,447.99 × 83,321.49 - Step 4: Simplify right side
128,628.45x = 14,785,230,924.31 - Step 5: Solve for x
x = 14,785,230,924.31/128,628.45 - Step 6: Final answer
x = 114,945.26
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1.5x scale
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.