Finding the Fourth Proportional to 138,441.78, 191,049.77 and 74,779.63
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Solution
The fourth proportional to 138,441.78, 191,049.77 and 74,779.63 is: 103,195.95
Step by Step Solution
- Step 1: Write the proportion equation
138,441.78 : 191,049.77 = 74,779.63 : x - Step 2: Convert to fraction form
138,441.78/191,049.77 = 74,779.63/x - Step 3: Cross multiply
138,441.78x = 191,049.77 × 74,779.63 - Step 4: Simplify right side
138,441.78x = 14,286,630,821.51 - Step 5: Solve for x
x = 14,286,630,821.51/138,441.78 - Step 6: Final answer
x = 103,195.95
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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.