Finding the Fourth Proportional to 128,859.23, 193,211.17 and 57,769.00
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Solution
The fourth proportional to 128,859.23, 193,211.17 and 57,769.00 is: 86,618.69
Step by Step Solution
- Step 1: Write the proportion equation
128,859.23 : 193,211.17 = 57,769.00 : x - Step 2: Convert to fraction form
128,859.23/193,211.17 = 57,769.00/x - Step 3: Cross multiply
128,859.23x = 193,211.17 × 57,769.00 - Step 4: Simplify right side
128,859.23x = 11,161,616,864.04 - Step 5: Solve for x
x = 11,161,616,864.04/128,859.23 - Step 6: Final answer
x = 86,618.69
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.