Finding the Fourth Proportional to 138,031.39, 206,661.40 and 74,624.34
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Solution
The fourth proportional to 138,031.39, 206,661.40 and 74,624.34 is: 111,727.99
Step by Step Solution
- Step 1: Write the proportion equation
138,031.39 : 206,661.40 = 74,624.34 : x - Step 2: Convert to fraction form
138,031.39/206,661.40 = 74,624.34/x - Step 3: Cross multiply
138,031.39x = 206,661.40 × 74,624.34 - Step 4: Simplify right side
138,031.39x = 15,421,969,172.05 - Step 5: Solve for x
x = 15,421,969,172.05/138,031.39 - Step 6: Final answer
x = 111,727.99
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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.