Finding the Fourth Proportional to 128,506.23, 177,338.97 and 71,917.61
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Solution
The fourth proportional to 128,506.23, 177,338.97 and 71,917.61 is: 99,246.50
Step by Step Solution
- Step 1: Write the proportion equation
128,506.23 : 177,338.97 = 71,917.61 : x - Step 2: Convert to fraction form
128,506.23/177,338.97 = 71,917.61/x - Step 3: Cross multiply
128,506.23x = 177,338.97 × 71,917.61 - Step 4: Simplify right side
128,506.23x = 12,753,793,995.57 - Step 5: Solve for x
x = 12,753,793,995.57/128,506.23 - Step 6: Final answer
x = 99,246.50
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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.