Finding the Fourth Proportional to 81,323.35, 121,954.68 and 28,000.26
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Solution
The fourth proportional to 81,323.35, 121,954.68 and 28,000.26 is: 41,989.94
Step by Step Solution
- Step 1: Write the proportion equation
81,323.35 : 121,954.68 = 28,000.26 : x - Step 2: Convert to fraction form
81,323.35/121,954.68 = 28,000.26/x - Step 3: Cross multiply
81,323.35x = 121,954.68 × 28,000.26 - Step 4: Simplify right side
81,323.35x = 3,414,762,748.22 - Step 5: Solve for x
x = 3,414,762,748.22/81,323.35 - Step 6: Final answer
x = 41,989.94
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1.5x scale
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.