Finding the Fourth Proportional to 115,902.20, 159,787.99 and 99,087.07
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Solution
The fourth proportional to 115,902.20, 159,787.99 and 99,087.07 is: 136,605.89
Step by Step Solution
- Step 1: Write the proportion equation
115,902.20 : 159,787.99 = 99,087.07 : x - Step 2: Convert to fraction form
115,902.20/159,787.99 = 99,087.07/x - Step 3: Cross multiply
115,902.20x = 159,787.99 × 99,087.07 - Step 4: Simplify right side
115,902.20x = 15,832,923,750.29 - Step 5: Solve for x
x = 15,832,923,750.29/115,902.20 - Step 6: Final answer
x = 136,605.89
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1.5x scale
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.