Finding the Fourth Proportional to 138,689.42, 191,390.74 and 75,026.66
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Solution
The fourth proportional to 138,689.42, 191,390.74 and 75,026.66 is: 103,536.43
Step by Step Solution
- Step 1: Write the proportion equation
138,689.42 : 191,390.74 = 75,026.66 : x - Step 2: Convert to fraction form
138,689.42/191,390.74 = 75,026.66/x - Step 3: Cross multiply
138,689.42x = 191,390.74 × 75,026.66 - Step 4: Simplify right side
138,689.42x = 14,359,407,977.13 - Step 5: Solve for x
x = 14,359,407,977.13/138,689.42 - Step 6: Final answer
x = 103,536.43
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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.