Finding the Fourth Proportional to 128,185,787.51, 176,896,147.42 and 69,449,912.45
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Solution
The fourth proportional to 128,185,787.51, 176,896,147.42 and 69,449,912.45 is: 95,840,749.51
Step by Step Solution
- Step 1: Write the proportion equation
128,185,787.51 : 176,896,147.42 = 69,449,912.45 : x - Step 2: Convert to fraction form
128,185,787.51/176,896,147.42 = 69,449,912.45/x - Step 3: Cross multiply
128,185,787.51x = 176,896,147.42 × 69,449,912.45 - Step 4: Simplify right side
128,185,787.51x = 12,285,421,951,061,292 - Step 5: Solve for x
x = 12,285,421,951,061,292/128,185,787.51 - Step 6: Final answer
x = 95,840,749.51
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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.