Finding the Fourth Proportional to 90,107.11, 135,768.91 and 74,655.95
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Solution
The fourth proportional to 90,107.11, 135,768.91 and 74,655.95 is: 112,487.88
Step by Step Solution
- Step 1: Write the proportion equation
90,107.11 : 135,768.91 = 74,655.95 : x - Step 2: Convert to fraction form
90,107.11/135,768.91 = 74,655.95/x - Step 3: Cross multiply
90,107.11x = 135,768.91 × 74,655.95 - Step 4: Simplify right side
90,107.11x = 10,135,957,109.30 - Step 5: Solve for x
x = 10,135,957,109.30/90,107.11 - Step 6: Final answer
x = 112,487.88
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.