Finding the Fourth Proportional to 81,631.23, 122,423.64 and 31,700.67
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Solution
The fourth proportional to 81,631.23, 122,423.64 and 31,700.67 is: 47,541.99
Step by Step Solution
- Step 1: Write the proportion equation
81,631.23 : 122,423.64 = 31,700.67 : x - Step 2: Convert to fraction form
81,631.23/122,423.64 = 31,700.67/x - Step 3: Cross multiply
81,631.23x = 122,423.64 × 31,700.67 - Step 4: Simplify right side
81,631.23x = 3,880,911,411.84 - Step 5: Solve for x
x = 3,880,911,411.84/81,631.23 - Step 6: Final answer
x = 47,541.99
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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.