Finding the Fourth Proportional to 80,865.19, 120,729.18 and 61,789.99
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Solution
The fourth proportional to 80,865.19, 120,729.18 and 61,789.99 is: 92,250.51
Step by Step Solution
- Step 1: Write the proportion equation
80,865.19 : 120,729.18 = 61,789.99 : x - Step 2: Convert to fraction form
80,865.19/120,729.18 = 61,789.99/x - Step 3: Cross multiply
80,865.19x = 120,729.18 × 61,789.99 - Step 4: Simplify right side
80,865.19x = 7,459,854,824.91 - Step 5: Solve for x
x = 7,459,854,824.91/80,865.19 - Step 6: Final answer
x = 92,250.51
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.