Finding the Fourth Proportional to 128,343,021.68, 177,136,012.92 and 76,160,829.92
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Solution
The fourth proportional to 128,343,021.68, 177,136,012.92 and 76,160,829.92 is: 105,115,382.01
Step by Step Solution
- Step 1: Write the proportion equation
128,343,021.68 : 177,136,012.92 = 76,160,829.92 : x - Step 2: Convert to fraction form
128,343,021.68/177,136,012.92 = 76,160,829.92/x - Step 3: Cross multiply
128,343,021.68x = 177,136,012.92 × 76,160,829.92 - Step 4: Simplify right side
128,343,021.68x = 13,490,825,752,707,042 - Step 5: Solve for x
x = 13,490,825,752,707,042/128,343,021.68 - Step 6: Final answer
x = 105,115,382.01
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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.