Finding the Fourth Proportional to 81,833.12, 112,902.55 and 66,699.75
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Solution
The fourth proportional to 81,833.12, 112,902.55 and 66,699.75 is: 92,023.52
Step by Step Solution
- Step 1: Write the proportion equation
81,833.12 : 112,902.55 = 66,699.75 : x - Step 2: Convert to fraction form
81,833.12/112,902.55 = 66,699.75/x - Step 3: Cross multiply
81,833.12x = 112,902.55 × 66,699.75 - Step 4: Simplify right side
81,833.12x = 7,530,571,692.61 - Step 5: Solve for x
x = 7,530,571,692.61/81,833.12 - Step 6: Final answer
x = 92,023.52
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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.