Finding the Fourth Proportional to 115,904.19, 159,790.74 and 99,089.07
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Solution
The fourth proportional to 115,904.19, 159,790.74 and 99,089.07 is: 136,608.66
Step by Step Solution
- Step 1: Write the proportion equation
115,904.19 : 159,790.74 = 99,089.07 : x - Step 2: Convert to fraction form
115,904.19/159,790.74 = 99,089.07/x - Step 3: Cross multiply
115,904.19x = 159,790.74 × 99,089.07 - Step 4: Simplify right side
115,904.19x = 15,833,515,821.21 - Step 5: Solve for x
x = 15,833,515,821.21/115,904.19 - Step 6: Final answer
x = 136,608.66
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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.