Finding the Fourth Proportional to 138,655.80, 207,983.70 and 121,159.80
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Solution
The fourth proportional to 138,655.80, 207,983.70 and 121,159.80 is: 181,739.70
Step by Step Solution
- Step 1: Write the proportion equation
138,655.80 : 207,983.70 = 121,159.80 : x - Step 2: Convert to fraction form
138,655.80/207,983.70 = 121,159.80/x - Step 3: Cross multiply
138,655.80x = 207,983.70 × 121,159.80 - Step 4: Simplify right side
138,655.80x = 25,199,263,495.26 - Step 5: Solve for x
x = 25,199,263,495.26/138,655.80 - Step 6: Final answer
x = 181,739.70
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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.