Finding the Fourth Proportional to 138,128.90, 207,172.84 and 38,278.68
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Solution
The fourth proportional to 138,128.90, 207,172.84 and 38,278.68 is: 57,412.34
Step by Step Solution
- Step 1: Write the proportion equation
138,128.90 : 207,172.84 = 38,278.68 : x - Step 2: Convert to fraction form
138,128.90/207,172.84 = 38,278.68/x - Step 3: Cross multiply
138,128.90x = 207,172.84 × 38,278.68 - Step 4: Simplify right side
138,128.90x = 7,930,302,847.05 - Step 5: Solve for x
x = 7,930,302,847.05/138,128.90 - Step 6: Final answer
x = 57,412.34
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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.