Finding the Fourth Proportional to 81,220.28, 121,798.14 and 31,272.70
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Solution
The fourth proportional to 81,220.28, 121,798.14 and 31,272.70 is: 46,896.62
Step by Step Solution
- Step 1: Write the proportion equation
81,220.28 : 121,798.14 = 31,272.70 : x - Step 2: Convert to fraction form
81,220.28/121,798.14 = 31,272.70/x - Step 3: Cross multiply
81,220.28x = 121,798.14 × 31,272.70 - Step 4: Simplify right side
81,220.28x = 3,808,956,692.78 - Step 5: Solve for x
x = 3,808,956,692.78/81,220.28 - Step 6: Final answer
x = 46,896.62
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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.