Finding the Fourth Proportional to 100,251.08, 138,030.88 and 85,113.80
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Solution
The fourth proportional to 100,251.08, 138,030.88 and 85,113.80 is: 117,189.09
Step by Step Solution
- Step 1: Write the proportion equation
100,251.08 : 138,030.88 = 85,113.80 : x - Step 2: Convert to fraction form
100,251.08/138,030.88 = 85,113.80/x - Step 3: Cross multiply
100,251.08x = 138,030.88 × 85,113.80 - Step 4: Simplify right side
100,251.08x = 11,748,332,714.14 - Step 5: Solve for x
x = 11,748,332,714.14/100,251.08 - Step 6: Final answer
x = 117,189.09
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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.