Finding the Fourth Proportional to 81,509.22, 122,253.36 and 31,555.08
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Solution
The fourth proportional to 81,509.22, 122,253.36 and 31,555.08 is: 47,328.57
Step by Step Solution
- Step 1: Write the proportion equation
81,509.22 : 122,253.36 = 31,555.08 : x - Step 2: Convert to fraction form
81,509.22/122,253.36 = 31,555.08/x - Step 3: Cross multiply
81,509.22x = 122,253.36 × 31,555.08 - Step 4: Simplify right side
81,509.22x = 3,857,714,555.07 - Step 5: Solve for x
x = 3,857,714,555.07/81,509.22 - Step 6: Final answer
x = 47,328.57
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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.