Finding the Fourth Proportional to 138,157.83, 190,649.99 and 77,731.02
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Solution
The fourth proportional to 138,157.83, 190,649.99 and 77,731.02 is: 107,264.41
Step by Step Solution
- Step 1: Write the proportion equation
138,157.83 : 190,649.99 = 77,731.02 : x - Step 2: Convert to fraction form
138,157.83/190,649.99 = 77,731.02/x - Step 3: Cross multiply
138,157.83x = 190,649.99 × 77,731.02 - Step 4: Simplify right side
138,157.83x = 14,819,417,797.03 - Step 5: Solve for x
x = 14,819,417,797.03/138,157.83 - Step 6: Final answer
x = 107,264.41
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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.