Finding the Fourth Proportional to 81,147.74, 121,821.84 and 38,493.95
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Solution
The fourth proportional to 81,147.74, 121,821.84 and 38,493.95 is: 57,788.47
Step by Step Solution
- Step 1: Write the proportion equation
81,147.74 : 121,821.84 = 38,493.95 : x - Step 2: Convert to fraction form
81,147.74/121,821.84 = 38,493.95/x - Step 3: Cross multiply
81,147.74x = 121,821.84 × 38,493.95 - Step 4: Simplify right side
81,147.74x = 4,689,403,208.76 - Step 5: Solve for x
x = 4,689,403,208.76/81,147.74 - Step 6: Final answer
x = 57,788.47
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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.