Finding the Fourth Proportional to 99,603.80, 149,405.70 and 47,115.80
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Solution
The fourth proportional to 99,603.80, 149,405.70 and 47,115.80 is: 70,673.70
Step by Step Solution
- Step 1: Write the proportion equation
99,603.80 : 149,405.70 = 47,115.80 : x - Step 2: Convert to fraction form
99,603.80/149,405.70 = 47,115.80/x - Step 3: Cross multiply
99,603.80x = 149,405.70 × 47,115.80 - Step 4: Simplify right side
99,603.80x = 7,039,369,080.06 - Step 5: Solve for x
x = 7,039,369,080.06/99,603.80 - Step 6: Final answer
x = 70,673.70
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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.