Finding the Fourth Proportional to 81,115.46, 111,938.16 and 45,305.99
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Solution
The fourth proportional to 81,115.46, 111,938.16 and 45,305.99 is: 62,521.61
Step by Step Solution
- Step 1: Write the proportion equation
81,115.46 : 111,938.16 = 45,305.99 : x - Step 2: Convert to fraction form
81,115.46/111,938.16 = 45,305.99/x - Step 3: Cross multiply
81,115.46x = 111,938.16 × 45,305.99 - Step 4: Simplify right side
81,115.46x = 5,071,469,157.58 - Step 5: Solve for x
x = 5,071,469,157.58/81,115.46 - Step 6: Final answer
x = 62,521.61
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.