Finding the Fourth Proportional to 201,639.80, 302,459.70 and 139,431.80
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Solution
The fourth proportional to 201,639.80, 302,459.70 and 139,431.80 is: 209,147.70
Step by Step Solution
- Step 1: Write the proportion equation
201,639.80 : 302,459.70 = 139,431.80 : x - Step 2: Convert to fraction form
201,639.80/302,459.70 = 139,431.80/x - Step 3: Cross multiply
201,639.80x = 302,459.70 × 139,431.80 - Step 4: Simplify right side
201,639.80x = 42,172,500,398.46 - Step 5: Solve for x
x = 42,172,500,398.46/201,639.80 - Step 6: Final answer
x = 209,147.70
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1.5x scale
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.