Finding the Fourth Proportional to 210,823.21, 290,936.91 and 115,331.50
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Solution
The fourth proportional to 210,823.21, 290,936.91 and 115,331.50 is: 159,157.95
Step by Step Solution
- Step 1: Write the proportion equation
210,823.21 : 290,936.91 = 115,331.50 : x - Step 2: Convert to fraction form
210,823.21/290,936.91 = 115,331.50/x - Step 3: Cross multiply
210,823.21x = 290,936.91 × 115,331.50 - Step 4: Simplify right side
210,823.21x = 33,554,190,235.67 - Step 5: Solve for x
x = 33,554,190,235.67/210,823.21 - Step 6: Final answer
x = 159,157.95
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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.