Finding the Fourth Proportional to 77,120.40, 115,607.70 and 45,554.70
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Solution
The fourth proportional to 77,120.40, 115,607.70 and 45,554.70 is: 68,288.99
Step by Step Solution
- Step 1: Write the proportion equation
77,120.40 : 115,607.70 = 45,554.70 : x - Step 2: Convert to fraction form
77,120.40/115,607.70 = 45,554.70/x - Step 3: Cross multiply
77,120.40x = 115,607.70 × 45,554.70 - Step 4: Simplify right side
77,120.40x = 5,266,474,091.19 - Step 5: Solve for x
x = 5,266,474,091.19/77,120.40 - Step 6: Final answer
x = 68,288.99
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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.