Finding the Fourth Proportional to 128,718,214.08, 177,631,829.28 and 75,797,217.60
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Solution
The fourth proportional to 128,718,214.08, 177,631,829.28 and 75,797,217.60 is: 104,600,568.87
Step by Step Solution
- Step 1: Write the proportion equation
128,718,214.08 : 177,631,829.28 = 75,797,217.60 : x - Step 2: Convert to fraction form
128,718,214.08/177,631,829.28 = 75,797,217.60/x - Step 3: Cross multiply
128,718,214.08x = 177,631,829.28 × 75,797,217.60 - Step 4: Simplify right side
128,718,214.08x = 13,463,998,416,622,210 - Step 5: Solve for x
x = 13,463,998,416,622,210/128,718,214.08 - Step 6: Final answer
x = 104,600,568.87
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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.