Finding the Fourth Proportional to 138,650.88, 191,338.18 and 74,988.66
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Solution
The fourth proportional to 138,650.88, 191,338.18 and 74,988.66 is: 103,484.33
Step by Step Solution
- Step 1: Write the proportion equation
138,650.88 : 191,338.18 = 74,988.66 : x - Step 2: Convert to fraction form
138,650.88/191,338.18 = 74,988.66/x - Step 3: Cross multiply
138,650.88x = 191,338.18 × 74,988.66 - Step 4: Simplify right side
138,650.88x = 14,348,192,820.05 - Step 5: Solve for x
x = 14,348,192,820.05/138,650.88 - Step 6: Final answer
x = 103,484.33
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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.