Finding the Fourth Proportional to 126,421.57, 189,639.64 and 47,536.48
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Solution
The fourth proportional to 126,421.57, 189,639.64 and 47,536.48 is: 71,307.45
Step by Step Solution
- Step 1: Write the proportion equation
126,421.57 : 189,639.64 = 47,536.48 : x - Step 2: Convert to fraction form
126,421.57/189,639.64 = 47,536.48/x - Step 3: Cross multiply
126,421.57x = 189,639.64 × 47,536.48 - Step 4: Simplify right side
126,421.57x = 9,014,800,005.87 - Step 5: Solve for x
x = 9,014,800,005.87/126,421.57 - Step 6: Final answer
x = 71,307.45
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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.