Finding the Fourth Proportional to 138,442.30, 191,050.37 and 74,780.09
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Solution
The fourth proportional to 138,442.30, 191,050.37 and 74,780.09 is: 103,196.53
Step by Step Solution
- Step 1: Write the proportion equation
138,442.30 : 191,050.37 = 74,780.09 : x - Step 2: Convert to fraction form
138,442.30/191,050.37 = 74,780.09/x - Step 3: Cross multiply
138,442.30x = 191,050.37 × 74,780.09 - Step 4: Simplify right side
138,442.30x = 14,286,764,815.82 - Step 5: Solve for x
x = 14,286,764,815.82/138,442.30 - Step 6: Final answer
x = 103,196.53
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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.