Finding the Fourth Proportional to 128,603.14, 193,200.36 and 90,739.56
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Solution
The fourth proportional to 128,603.14, 193,200.36 and 90,739.56 is: 136,317.94
Step by Step Solution
- Step 1: Write the proportion equation
128,603.14 : 193,200.36 = 90,739.56 : x - Step 2: Convert to fraction form
128,603.14/193,200.36 = 90,739.56/x - Step 3: Cross multiply
128,603.14x = 193,200.36 × 90,739.56 - Step 4: Simplify right side
128,603.14x = 17,530,915,658.24 - Step 5: Solve for x
x = 17,530,915,658.24/128,603.14 - Step 6: Final answer
x = 136,317.94
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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.