Finding the Fourth Proportional to 138,782.16, 207,656.87 and 121,835.30
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Solution
The fourth proportional to 138,782.16, 207,656.87 and 121,835.30 is: 182,299.62
Step by Step Solution
- Step 1: Write the proportion equation
138,782.16 : 207,656.87 = 121,835.30 : x - Step 2: Convert to fraction form
138,782.16/207,656.87 = 121,835.30/x - Step 3: Cross multiply
138,782.16x = 207,656.87 × 121,835.30 - Step 4: Simplify right side
138,782.16x = 25,299,935,406.05 - Step 5: Solve for x
x = 25,299,935,406.05/138,782.16 - Step 6: Final answer
x = 182,299.62
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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.