Finding the Fourth Proportional to 81,987.60, 122,994.36 and 28,694.48
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Solution
The fourth proportional to 81,987.60, 122,994.36 and 28,694.48 is: 43,046.26
Step by Step Solution
- Step 1: Write the proportion equation
81,987.60 : 122,994.36 = 28,694.48 : x - Step 2: Convert to fraction form
81,987.60/122,994.36 = 28,694.48/x - Step 3: Cross multiply
81,987.60x = 122,994.36 × 28,694.48 - Step 4: Simplify right side
81,987.60x = 3,529,259,203.13 - Step 5: Solve for x
x = 3,529,259,203.13/81,987.60 - Step 6: Final answer
x = 43,046.26
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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.