Finding the Fourth Proportional to 154,197.68, 212,828.40 and 100,389.08
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Solution
The fourth proportional to 154,197.68, 212,828.40 and 100,389.08 is: 138,560.11
Step by Step Solution
- Step 1: Write the proportion equation
154,197.68 : 212,828.40 = 100,389.08 : x - Step 2: Convert to fraction form
154,197.68/212,828.40 = 100,389.08/x - Step 3: Cross multiply
154,197.68x = 212,828.40 × 100,389.08 - Step 4: Simplify right side
154,197.68x = 21,365,647,273.87 - Step 5: Solve for x
x = 21,365,647,273.87/154,197.68 - Step 6: Final answer
x = 138,560.11
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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.