Finding the Fourth Proportional to 115,816.80, 173,725.20 and 81,991.20
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Solution
The fourth proportional to 115,816.80, 173,725.20 and 81,991.20 is: 122,986.80
Step by Step Solution
- Step 1: Write the proportion equation
115,816.80 : 173,725.20 = 81,991.20 : x - Step 2: Convert to fraction form
115,816.80/173,725.20 = 81,991.20/x - Step 3: Cross multiply
115,816.80x = 173,725.20 × 81,991.20 - Step 4: Simplify right side
115,816.80x = 14,243,937,618.24 - Step 5: Solve for x
x = 14,243,937,618.24/115,816.80 - Step 6: Final answer
x = 122,986.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.