Finding the Fourth Proportional to 87,739.68, 121,028.81 and 53,763.42
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Solution
The fourth proportional to 87,739.68, 121,028.81 and 53,763.42 is: 74,161.68
Step by Step Solution
- Step 1: Write the proportion equation
87,739.68 : 121,028.81 = 53,763.42 : x - Step 2: Convert to fraction form
87,739.68/121,028.81 = 53,763.42/x - Step 3: Cross multiply
87,739.68x = 121,028.81 × 53,763.42 - Step 4: Simplify right side
87,739.68x = 6,506,922,475.31 - Step 5: Solve for x
x = 6,506,922,475.31/87,739.68 - Step 6: Final answer
x = 74,161.68
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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.