Finding the Fourth Proportional to 128,382,992.61, 177,168,529.81 and 73,380,030.09
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Solution
The fourth proportional to 128,382,992.61, 177,168,529.81 and 73,380,030.09 is: 101,264,441.53
Step by Step Solution
- Step 1: Write the proportion equation
128,382,992.61 : 177,168,529.81 = 73,380,030.09 : x - Step 2: Convert to fraction form
128,382,992.61/177,168,529.81 = 73,380,030.09/x - Step 3: Cross multiply
128,382,992.61x = 177,168,529.81 × 73,380,030.09 - Step 4: Simplify right side
128,382,992.61x = 13,000,632,048,458,862 - Step 5: Solve for x
x = 13,000,632,048,458,862/128,382,992.61 - Step 6: Final answer
x = 101,264,441.53
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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.