Finding the Fourth Proportional to 129,863.60, 194,795.40 and 74,465.20
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Solution
The fourth proportional to 129,863.60, 194,795.40 and 74,465.20 is: 111,697.80
Step by Step Solution
- Step 1: Write the proportion equation
129,863.60 : 194,795.40 = 74,465.20 : x - Step 2: Convert to fraction form
129,863.60/194,795.40 = 74,465.20/x - Step 3: Cross multiply
129,863.60x = 194,795.40 × 74,465.20 - Step 4: Simplify right side
129,863.60x = 14,505,478,420.08 - Step 5: Solve for x
x = 14,505,478,420.08/129,863.60 - Step 6: Final answer
x = 111,697.80
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1.5x scale
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.