Finding the Fourth Proportional to 81,465.20, 122,197.80 and 74,466.80
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Solution
The fourth proportional to 81,465.20, 122,197.80 and 74,466.80 is: 111,700.20
Step by Step Solution
- Step 1: Write the proportion equation
81,465.20 : 122,197.80 = 74,466.80 : x - Step 2: Convert to fraction form
81,465.20/122,197.80 = 74,466.80/x - Step 3: Cross multiply
81,465.20x = 122,197.80 × 74,466.80 - Step 4: Simplify right side
81,465.20x = 9,099,679,133.04 - Step 5: Solve for x
x = 9,099,679,133.04/81,465.20 - Step 6: Final answer
x = 111,700.20
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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.