Finding the Fourth Proportional to 81,285.60, 121,755.60 and 67,461.60
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Solution
The fourth proportional to 81,285.60, 121,755.60 and 67,461.60 is: 101,048.99
Step by Step Solution
- Step 1: Write the proportion equation
81,285.60 : 121,755.60 = 67,461.60 : x - Step 2: Convert to fraction form
81,285.60/121,755.60 = 67,461.60/x - Step 3: Cross multiply
81,285.60x = 121,755.60 × 67,461.60 - Step 4: Simplify right side
81,285.60x = 8,213,827,584.96 - Step 5: Solve for x
x = 8,213,827,584.96/81,285.60 - Step 6: Final answer
x = 101,048.99
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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.