Finding the Fourth Proportional to 81,803.08, 122,686.36 and 31,884.52
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Solution
The fourth proportional to 81,803.08, 122,686.36 and 31,884.52 is: 47,819.66
Step by Step Solution
- Step 1: Write the proportion equation
81,803.08 : 122,686.36 = 31,884.52 : x - Step 2: Convert to fraction form
81,803.08/122,686.36 = 31,884.52/x - Step 3: Cross multiply
81,803.08x = 122,686.36 × 31,884.52 - Step 4: Simplify right side
81,803.08x = 3,911,795,699.15 - Step 5: Solve for x
x = 3,911,795,699.15/81,803.08 - Step 6: Final answer
x = 47,819.66
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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.