Finding the Fourth Proportional to 109,125.20, 163,687.80 and 74,133.20
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Solution
The fourth proportional to 109,125.20, 163,687.80 and 74,133.20 is: 111,199.80
Step by Step Solution
- Step 1: Write the proportion equation
109,125.20 : 163,687.80 = 74,133.20 : x - Step 2: Convert to fraction form
109,125.20/163,687.80 = 74,133.20/x - Step 3: Cross multiply
109,125.20x = 163,687.80 × 74,133.20 - Step 4: Simplify right side
109,125.20x = 12,134,700,414.96 - Step 5: Solve for x
x = 12,134,700,414.96/109,125.20 - Step 6: Final answer
x = 111,199.80
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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.