Finding the Fourth Proportional to 81,221.13, 112,099.68 and 48,961.53
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Solution
The fourth proportional to 81,221.13, 112,099.68 and 48,961.53 is: 67,575.66
Step by Step Solution
- Step 1: Write the proportion equation
81,221.13 : 112,099.68 = 48,961.53 : x - Step 2: Convert to fraction form
81,221.13/112,099.68 = 48,961.53/x - Step 3: Cross multiply
81,221.13x = 112,099.68 × 48,961.53 - Step 4: Simplify right side
81,221.13x = 5,488,571,845.31 - Step 5: Solve for x
x = 5,488,571,845.31/81,221.13 - Step 6: Final answer
x = 67,575.66
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.