Finding the Fourth Proportional to 223,704.80, 308,725.91 and 128,217.66
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Solution
The fourth proportional to 223,704.80, 308,725.91 and 128,217.66 is: 176,947.99
Step by Step Solution
- Step 1: Write the proportion equation
223,704.80 : 308,725.91 = 128,217.66 : x - Step 2: Convert to fraction form
223,704.80/308,725.91 = 128,217.66/x - Step 3: Cross multiply
223,704.80x = 308,725.91 × 128,217.66 - Step 4: Simplify right side
223,704.80x = 39,584,113,761.57 - Step 5: Solve for x
x = 39,584,113,761.57/223,704.80 - Step 6: Final answer
x = 176,947.99
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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.