Finding the Fourth Proportional to 100,393.12, 138,544.36 and 55,073.42
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Solution
The fourth proportional to 100,393.12, 138,544.36 and 55,073.42 is: 76,002.33
Step by Step Solution
- Step 1: Write the proportion equation
100,393.12 : 138,544.36 = 55,073.42 : x - Step 2: Convert to fraction form
100,393.12/138,544.36 = 55,073.42/x - Step 3: Cross multiply
100,393.12x = 138,544.36 × 55,073.42 - Step 4: Simplify right side
100,393.12x = 7,630,111,416.05 - Step 5: Solve for x
x = 7,630,111,416.05/100,393.12 - Step 6: Final answer
x = 76,002.33
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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.