Finding the Fourth Proportional to 81,555.58, 122,291.85 and 31,649.99
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Solution
The fourth proportional to 81,555.58, 122,291.85 and 31,649.99 is: 47,458.87
Step by Step Solution
- Step 1: Write the proportion equation
81,555.58 : 122,291.85 = 31,649.99 : x - Step 2: Convert to fraction form
81,555.58/122,291.85 = 31,649.99/x - Step 3: Cross multiply
81,555.58x = 122,291.85 × 31,649.99 - Step 4: Simplify right side
81,555.58x = 3,870,535,829.58 - Step 5: Solve for x
x = 3,870,535,829.58/81,555.58 - Step 6: Final answer
x = 47,458.87
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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.