Finding the Fourth Proportional to 98,905.80, 136,568.20 and 91,349.08
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Solution
The fourth proportional to 98,905.80, 136,568.20 and 91,349.08 is: 126,133.95
Step by Step Solution
- Step 1: Write the proportion equation
98,905.80 : 136,568.20 = 91,349.08 : x - Step 2: Convert to fraction form
98,905.80/136,568.20 = 91,349.08/x - Step 3: Cross multiply
98,905.80x = 136,568.20 × 91,349.08 - Step 4: Simplify right side
98,905.80x = 12,475,379,427.26 - Step 5: Solve for x
x = 12,475,379,427.26/98,905.80 - Step 6: Final answer
x = 126,133.95
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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.