Finding the Fourth Proportional to 81,113.13, 121,669.70 and 25,709.13
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Solution
The fourth proportional to 81,113.13, 121,669.70 and 25,709.13 is: 38,563.70
Step by Step Solution
- Step 1: Write the proportion equation
81,113.13 : 121,669.70 = 25,709.13 : x - Step 2: Convert to fraction form
81,113.13/121,669.70 = 25,709.13/x - Step 3: Cross multiply
81,113.13x = 121,669.70 × 25,709.13 - Step 4: Simplify right side
81,113.13x = 3,128,022,134.36 - Step 5: Solve for x
x = 3,128,022,134.36/81,113.13 - Step 6: Final answer
x = 38,563.70
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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.