Finding the Fourth Proportional to 211,081.21, 291,289.11 and 115,587.88
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Solution
The fourth proportional to 211,081.21, 291,289.11 and 115,587.88 is: 159,509.65
Step by Step Solution
- Step 1: Write the proportion equation
211,081.21 : 291,289.11 = 115,587.88 : x - Step 2: Convert to fraction form
211,081.21/291,289.11 = 115,587.88/x - Step 3: Cross multiply
211,081.21x = 291,289.11 × 115,587.88 - Step 4: Simplify right side
211,081.21x = 33,669,490,691.99 - Step 5: Solve for x
x = 33,669,490,691.99/211,081.21 - Step 6: Final answer
x = 159,509.65
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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.