Finding the Fourth Proportional to 81,715.68, 122,474.56 and 57,985.92
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Solution
The fourth proportional to 81,715.68, 122,474.56 and 57,985.92 is: 86,908.66
Step by Step Solution
- Step 1: Write the proportion equation
81,715.68 : 122,474.56 = 57,985.92 : x - Step 2: Convert to fraction form
81,715.68/122,474.56 = 57,985.92/x - Step 3: Cross multiply
81,715.68x = 122,474.56 × 57,985.92 - Step 4: Simplify right side
81,715.68x = 7,101,800,038.20 - Step 5: Solve for x
x = 7,101,800,038.20/81,715.68 - Step 6: Final answer
x = 86,908.66
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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.