Finding the Fourth Proportional to 128,695.23, 177,611.13 and 77,733.27
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Solution
The fourth proportional to 128,695.23, 177,611.13 and 77,733.27 is: 107,278.99
Step by Step Solution
- Step 1: Write the proportion equation
128,695.23 : 177,611.13 = 77,733.27 : x - Step 2: Convert to fraction form
128,695.23/177,611.13 = 77,733.27/x - Step 3: Cross multiply
128,695.23x = 177,611.13 × 77,733.27 - Step 4: Simplify right side
128,695.23x = 13,806,293,923.30 - Step 5: Solve for x
x = 13,806,293,923.30/128,695.23 - Step 6: Final answer
x = 107,278.99
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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.