Finding the Fourth Proportional to 128,489.10, 192,741.21 and 49,603.74
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Solution
The fourth proportional to 128,489.10, 192,741.21 and 49,603.74 is: 74,408.53
Step by Step Solution
- Step 1: Write the proportion equation
128,489.10 : 192,741.21 = 49,603.74 : x - Step 2: Convert to fraction form
128,489.10/192,741.21 = 49,603.74/x - Step 3: Cross multiply
128,489.10x = 192,741.21 × 49,603.74 - Step 4: Simplify right side
128,489.10x = 9,560,684,868.13 - Step 5: Solve for x
x = 9,560,684,868.13/128,489.10 - Step 6: Final answer
x = 74,408.53
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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.