Finding the Fourth Proportional to 81,135.68, 121,407.48 and 47,871.68
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Solution
The fourth proportional to 81,135.68, 121,407.48 and 47,871.68 is: 71,632.85
Step by Step Solution
- Step 1: Write the proportion equation
81,135.68 : 121,407.48 = 47,871.68 : x - Step 2: Convert to fraction form
81,135.68/121,407.48 = 47,871.68/x - Step 3: Cross multiply
81,135.68x = 121,407.48 × 47,871.68 - Step 4: Simplify right side
81,135.68x = 5,811,980,032.17 - Step 5: Solve for x
x = 5,811,980,032.17/81,135.68 - Step 6: Final answer
x = 71,632.85
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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.