Finding the Fourth Proportional to 81,135.10, 121,712.90 and 27,812.63
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Solution
The fourth proportional to 81,135.10, 121,712.90 and 27,812.63 is: 41,722.45
Step by Step Solution
- Step 1: Write the proportion equation
81,135.10 : 121,712.90 = 27,812.63 : x - Step 2: Convert to fraction form
81,135.10/121,712.90 = 27,812.63/x - Step 3: Cross multiply
81,135.10x = 121,712.90 × 27,812.63 - Step 4: Simplify right side
81,135.10x = 3,385,155,314.89 - Step 5: Solve for x
x = 3,385,155,314.89/81,135.10 - Step 6: Final answer
x = 41,722.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.