Finding the Fourth Proportional to 221,250,693.19, 305,324,213.74 and 128,439,830.47
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Solution
The fourth proportional to 221,250,693.19, 305,324,213.74 and 128,439,830.47 is: 177,245,954.29
Step by Step Solution
- Step 1: Write the proportion equation
221,250,693.19 : 305,324,213.74 = 128,439,830.47 : x - Step 2: Convert to fraction form
221,250,693.19/305,324,213.74 = 128,439,830.47/x - Step 3: Cross multiply
221,250,693.19x = 305,324,213.74 × 128,439,830.47 - Step 4: Simplify right side
221,250,693.19x = 39,215,790,251,935,320 - Step 5: Solve for x
x = 39,215,790,251,935,320/221,250,693.19 - Step 6: Final answer
x = 177,245,954.29
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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.