Finding the Fourth Proportional to 221,459.05, 305,613.40 and 120,857.05
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Solution
The fourth proportional to 221,459.05, 305,613.40 and 120,857.05 is: 166,782.68
Step by Step Solution
- Step 1: Write the proportion equation
221,459.05 : 305,613.40 = 120,857.05 : x - Step 2: Convert to fraction form
221,459.05/305,613.40 = 120,857.05/x - Step 3: Cross multiply
221,459.05x = 305,613.40 × 120,857.05 - Step 4: Simplify right side
221,459.05x = 36,935,532,898.29 - Step 5: Solve for x
x = 36,935,532,898.29/221,459.05 - Step 6: Final answer
x = 166,782.68
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1.5x scale
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.