Finding the Fourth Proportional to 138,790.08, 191,532.87 and 81,470.43
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Solution
The fourth proportional to 138,790.08, 191,532.87 and 81,470.43 is: 112,430.70
Step by Step Solution
- Step 1: Write the proportion equation
138,790.08 : 191,532.87 = 81,470.43 : x - Step 2: Convert to fraction form
138,790.08/191,532.87 = 81,470.43/x - Step 3: Cross multiply
138,790.08x = 191,532.87 × 81,470.43 - Step 4: Simplify right side
138,790.08x = 15,604,265,278.03 - Step 5: Solve for x
x = 15,604,265,278.03/138,790.08 - Step 6: Final answer
x = 112,430.70
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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.