Finding the Fourth Proportional to 138,899.28, 208,358.08 and 54,652.80
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Solution
The fourth proportional to 138,899.28, 208,358.08 and 54,652.80 is: 81,982.80
Step by Step Solution
- Step 1: Write the proportion equation
138,899.28 : 208,358.08 = 54,652.80 : x - Step 2: Convert to fraction form
138,899.28/208,358.08 = 54,652.80/x - Step 3: Cross multiply
138,899.28x = 208,358.08 × 54,652.80 - Step 4: Simplify right side
138,899.28x = 11,387,352,474.62 - Step 5: Solve for x
x = 11,387,352,474.62/138,899.28 - Step 6: Final answer
x = 81,982.80
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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.