Finding the Fourth Proportional to 221,586,710.36, 305,827,631.79 and 128,821,026.61
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Solution
The fourth proportional to 221,586,710.36, 305,827,631.79 and 128,821,026.61 is: 177,795,091.72
Step by Step Solution
- Step 1: Write the proportion equation
221,586,710.36 : 305,827,631.79 = 128,821,026.61 : x - Step 2: Convert to fraction form
221,586,710.36/305,827,631.79 = 128,821,026.61/x - Step 3: Cross multiply
221,586,710.36x = 305,827,631.79 × 128,821,026.61 - Step 4: Simplify right side
221,586,710.36x = 39,397,029,491,363,736 - Step 5: Solve for x
x = 39,397,029,491,363,736/221,586,710.36 - Step 6: Final answer
x = 177,795,091.72
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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.