Finding the Fourth Proportional to 211,013.68, 291,119.38 and 138,456.63
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Solution
The fourth proportional to 211,013.68, 291,119.38 and 138,456.63 is: 191,017.99
Step by Step Solution
- Step 1: Write the proportion equation
211,013.68 : 291,119.38 = 138,456.63 : x - Step 2: Convert to fraction form
211,013.68/291,119.38 = 138,456.63/x - Step 3: Cross multiply
211,013.68x = 291,119.38 × 138,456.63 - Step 4: Simplify right side
211,013.68x = 40,307,408,282.49 - Step 5: Solve for x
x = 40,307,408,282.49/211,013.68 - Step 6: Final answer
x = 191,017.99
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1.5x scale
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.