Finding the Fourth Proportional to 117,135.12, 161,646.25 and 63,420.13
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Solution
The fourth proportional to 117,135.12, 161,646.25 and 63,420.13 is: 87,519.66
Step by Step Solution
- Step 1: Write the proportion equation
117,135.12 : 161,646.25 = 63,420.13 : x - Step 2: Convert to fraction form
117,135.12/161,646.25 = 63,420.13/x - Step 3: Cross multiply
117,135.12x = 161,646.25 × 63,420.13 - Step 4: Simplify right side
117,135.12x = 10,251,626,189.01 - Step 5: Solve for x
x = 10,251,626,189.01/117,135.12 - Step 6: Final answer
x = 87,519.66
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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.