Finding the Fourth Proportional to 87,997.10, 121,404.18 and 57,798.80
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Solution
The fourth proportional to 87,997.10, 121,404.18 and 57,798.80 is: 79,741.45
Step by Step Solution
- Step 1: Write the proportion equation
87,997.10 : 121,404.18 = 57,798.80 : x - Step 2: Convert to fraction form
87,997.10/121,404.18 = 57,798.80/x - Step 3: Cross multiply
87,997.10x = 121,404.18 × 57,798.80 - Step 4: Simplify right side
87,997.10x = 7,017,015,918.98 - Step 5: Solve for x
x = 7,017,015,918.98/87,997.10 - Step 6: Final answer
x = 79,741.45
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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.