Finding the Fourth Proportional to 81,072.70, 121,578.06 and 38,941.06
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Solution
The fourth proportional to 81,072.70, 121,578.06 and 38,941.06 is: 58,396.70
Step by Step Solution
- Step 1: Write the proportion equation
81,072.70 : 121,578.06 = 38,941.06 : x - Step 2: Convert to fraction form
81,072.70/121,578.06 = 38,941.06/x - Step 3: Cross multiply
81,072.70x = 121,578.06 × 38,941.06 - Step 4: Simplify right side
81,072.70x = 4,734,378,529.14 - Step 5: Solve for x
x = 4,734,378,529.14/81,072.70 - Step 6: Final answer
x = 58,396.70
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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.