Finding the Fourth Proportional to 138,689.85, 191,391.58 and 75,027.63
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Solution
The fourth proportional to 138,689.85, 191,391.58 and 75,027.63 is: 103,537.90
Step by Step Solution
- Step 1: Write the proportion equation
138,689.85 : 191,391.58 = 75,027.63 : x - Step 2: Convert to fraction form
138,689.85/191,391.58 = 75,027.63/x - Step 3: Cross multiply
138,689.85x = 191,391.58 × 75,027.63 - Step 4: Simplify right side
138,689.85x = 14,359,656,274.22 - Step 5: Solve for x
x = 14,359,656,274.22/138,689.85 - Step 6: Final answer
x = 103,537.90
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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.