Finding the Fourth Proportional to 100,453.42, 138,627.43 and 55,135.63
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Solution
The fourth proportional to 100,453.42, 138,627.43 and 55,135.63 is: 76,088.11
Step by Step Solution
- Step 1: Write the proportion equation
100,453.42 : 138,627.43 = 55,135.63 : x - Step 2: Convert to fraction form
100,453.42/138,627.43 = 55,135.63/x - Step 3: Cross multiply
100,453.42x = 138,627.43 × 55,135.63 - Step 4: Simplify right side
100,453.42x = 7,643,310,254.13 - Step 5: Solve for x
x = 7,643,310,254.13/100,453.42 - Step 6: Final answer
x = 76,088.11
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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.