Finding the Fourth Proportional to 128,751,690.43, 177,682,006.79 and 73,758,175.75
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Solution
The fourth proportional to 128,751,690.43, 177,682,006.79 and 73,758,175.75 is: 101,788,960.13
Step by Step Solution
- Step 1: Write the proportion equation
128,751,690.43 : 177,682,006.79 = 73,758,175.75 : x - Step 2: Convert to fraction form
128,751,690.43/177,682,006.79 = 73,758,175.75/x - Step 3: Cross multiply
128,751,690.43x = 177,682,006.79 × 73,758,175.75 - Step 4: Simplify right side
128,751,690.43x = 13,105,500,684,429,512 - Step 5: Solve for x
x = 13,105,500,684,429,512/128,751,690.43 - Step 6: Final answer
x = 101,788,960.13
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.