Finding the Fourth Proportional to 81,129.60, 121,740.21 and 43,688.88
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Solution
The fourth proportional to 81,129.60, 121,740.21 and 43,688.88 is: 65,557.99
Step by Step Solution
- Step 1: Write the proportion equation
81,129.60 : 121,740.21 = 43,688.88 : x - Step 2: Convert to fraction form
81,129.60/121,740.21 = 43,688.88/x - Step 3: Cross multiply
81,129.60x = 121,740.21 × 43,688.88 - Step 4: Simplify right side
81,129.60x = 5,318,693,425.86 - Step 5: Solve for x
x = 5,318,693,425.86/81,129.60 - Step 6: Final answer
x = 65,557.99
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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.