Finding the Fourth Proportional to 189,419.28, 261,400.08 and 103,378.92
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Solution
The fourth proportional to 189,419.28, 261,400.08 and 103,378.92 is: 142,663.71
Step by Step Solution
- Step 1: Write the proportion equation
189,419.28 : 261,400.08 = 103,378.92 : x - Step 2: Convert to fraction form
189,419.28/261,400.08 = 103,378.92/x - Step 3: Cross multiply
189,419.28x = 261,400.08 × 103,378.92 - Step 4: Simplify right side
189,419.28x = 27,023,257,958.31 - Step 5: Solve for x
x = 27,023,257,958.31/189,419.28 - Step 6: Final answer
x = 142,663.71
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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.