Finding the Fourth Proportional to 221,121.60, 331,725.60 and 87,979.20
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Solution
The fourth proportional to 221,121.60, 331,725.60 and 87,979.20 is: 131,985.99
Step by Step Solution
- Step 1: Write the proportion equation
221,121.60 : 331,725.60 = 87,979.20 : x - Step 2: Convert to fraction form
221,121.60/331,725.60 = 87,979.20/x - Step 3: Cross multiply
221,121.60x = 331,725.60 × 87,979.20 - Step 4: Simplify right side
221,121.60x = 29,184,952,907.52 - Step 5: Solve for x
x = 29,184,952,907.52/221,121.60 - Step 6: Final answer
x = 131,985.99
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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.