Finding the Fourth Proportional to 75,135.13, 103,686.63 and 40,680.20
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Solution
The fourth proportional to 75,135.13, 103,686.63 and 40,680.20 is: 56,138.76
Step by Step Solution
- Step 1: Write the proportion equation
75,135.13 : 103,686.63 = 40,680.20 : x - Step 2: Convert to fraction form
75,135.13/103,686.63 = 40,680.20/x - Step 3: Cross multiply
75,135.13x = 103,686.63 × 40,680.20 - Step 4: Simplify right side
75,135.13x = 4,217,992,845.73 - Step 5: Solve for x
x = 4,217,992,845.73/75,135.13 - Step 6: Final answer
x = 56,138.76
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.