Finding the Fourth Proportional to 128,343,022.68, 177,136,014.30 and 76,160,830.92
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Solution
The fourth proportional to 128,343,022.68, 177,136,014.30 and 76,160,830.92 is: 105,115,383.39
Step by Step Solution
- Step 1: Write the proportion equation
128,343,022.68 : 177,136,014.30 = 76,160,830.92 : x - Step 2: Convert to fraction form
128,343,022.68/177,136,014.30 = 76,160,830.92/x - Step 3: Cross multiply
128,343,022.68x = 177,136,014.30 × 76,160,830.92 - Step 4: Simplify right side
128,343,022.68x = 13,490,826,034,945,004 - Step 5: Solve for x
x = 13,490,826,034,945,004/128,343,022.68 - Step 6: Final answer
x = 105,115,383.39
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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.