Finding the Fourth Proportional to 138,701.80, 208,052.70 and 129,953.80
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Solution
The fourth proportional to 138,701.80, 208,052.70 and 129,953.80 is: 194,930.70
Step by Step Solution
- Step 1: Write the proportion equation
138,701.80 : 208,052.70 = 129,953.80 : x - Step 2: Convert to fraction form
138,701.80/208,052.70 = 129,953.80/x - Step 3: Cross multiply
138,701.80x = 208,052.70 × 129,953.80 - Step 4: Simplify right side
138,701.80x = 27,037,238,965.26 - Step 5: Solve for x
x = 27,037,238,965.26/138,701.80 - Step 6: Final answer
x = 194,930.70
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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.