Finding the Fourth Proportional to 138,921.72, 208,357.68 and 39,057.96
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Solution
The fourth proportional to 138,921.72, 208,357.68 and 39,057.96 is: 58,579.94
Step by Step Solution
- Step 1: Write the proportion equation
138,921.72 : 208,357.68 = 39,057.96 : x - Step 2: Convert to fraction form
138,921.72/208,357.68 = 39,057.96/x - Step 3: Cross multiply
138,921.72x = 208,357.68 × 39,057.96 - Step 4: Simplify right side
138,921.72x = 8,138,025,931.13 - Step 5: Solve for x
x = 8,138,025,931.13/138,921.72 - Step 6: Final answer
x = 58,579.94
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.