Finding the Fourth Proportional to 153,431.21, 211,734.47 and 85,448.99
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Solution
The fourth proportional to 153,431.21, 211,734.47 and 85,448.99 is: 117,919.28
Step by Step Solution
- Step 1: Write the proportion equation
153,431.21 : 211,734.47 = 85,448.99 : x - Step 2: Convert to fraction form
153,431.21/211,734.47 = 85,448.99/x - Step 3: Cross multiply
153,431.21x = 211,734.47 × 85,448.99 - Step 4: Simplify right side
153,431.21x = 18,092,497,352.64 - Step 5: Solve for x
x = 18,092,497,352.64/153,431.21 - Step 6: Final answer
x = 117,919.28
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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.