Finding the Fourth Proportional to 81,468.40, 122,202.60 and 74,251.30
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Solution
The fourth proportional to 81,468.40, 122,202.60 and 74,251.30 is: 111,376.95
Step by Step Solution
- Step 1: Write the proportion equation
81,468.40 : 122,202.60 = 74,251.30 : x - Step 2: Convert to fraction form
81,468.40/122,202.60 = 74,251.30/x - Step 3: Cross multiply
81,468.40x = 122,202.60 × 74,251.30 - Step 4: Simplify right side
81,468.40x = 9,073,701,913.38 - Step 5: Solve for x
x = 9,073,701,913.38/81,468.40 - Step 6: Final answer
x = 111,376.95
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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.