Finding the Fourth Proportional to 128,980,160.54, 177,991,382.64 and 70,243,806.54
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Solution
The fourth proportional to 128,980,160.54, 177,991,382.64 and 70,243,806.54 is: 96,935,778.31
Step by Step Solution
- Step 1: Write the proportion equation
128,980,160.54 : 177,991,382.64 = 70,243,806.54 : x - Step 2: Convert to fraction form
128,980,160.54/177,991,382.64 = 70,243,806.54/x - Step 3: Cross multiply
128,980,160.54x = 177,991,382.64 × 70,243,806.54 - Step 4: Simplify right side
128,980,160.54x = 12,502,792,247,951,274 - Step 5: Solve for x
x = 12,502,792,247,951,274/128,980,160.54 - Step 6: Final answer
x = 96,935,778.31
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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.