Finding the Fourth Proportional to 138,860.24, 208,285.56 and 39,021.20
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Solution
The fourth proportional to 138,860.24, 208,285.56 and 39,021.20 is: 58,530.45
Step by Step Solution
- Step 1: Write the proportion equation
138,860.24 : 208,285.56 = 39,021.20 : x - Step 2: Convert to fraction form
138,860.24/208,285.56 = 39,021.20/x - Step 3: Cross multiply
138,860.24x = 208,285.56 × 39,021.20 - Step 4: Simplify right side
138,860.24x = 8,127,552,493.87 - Step 5: Solve for x
x = 8,127,552,493.87/138,860.24 - Step 6: Final answer
x = 58,530.45
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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.