Finding the Fourth Proportional to 75,431.20, 113,146.80 and 49,187.20
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Solution
The fourth proportional to 75,431.20, 113,146.80 and 49,187.20 is: 73,780.80
Step by Step Solution
- Step 1: Write the proportion equation
75,431.20 : 113,146.80 = 49,187.20 : x - Step 2: Convert to fraction form
75,431.20/113,146.80 = 49,187.20/x - Step 3: Cross multiply
75,431.20x = 113,146.80 × 49,187.20 - Step 4: Simplify right side
75,431.20x = 5,565,374,280.96 - Step 5: Solve for x
x = 5,565,374,280.96/75,431.20 - Step 6: Final answer
x = 73,780.80
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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.