Finding the Fourth Proportional to 81,924.40, 122,790.68 and 31,290.26
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Solution
The fourth proportional to 81,924.40, 122,790.68 and 31,290.26 is: 46,898.75
Step by Step Solution
- Step 1: Write the proportion equation
81,924.40 : 122,790.68 = 31,290.26 : x - Step 2: Convert to fraction form
81,924.40/122,790.68 = 31,290.26/x - Step 3: Cross multiply
81,924.40x = 122,790.68 × 31,290.26 - Step 4: Simplify right side
81,924.40x = 3,842,152,302.78 - Step 5: Solve for x
x = 3,842,152,302.78/81,924.40 - Step 6: Final answer
x = 46,898.75
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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.