Finding the Fourth Proportional to 209,988.80, 314,983.20 and 121,415.30
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Solution
The fourth proportional to 209,988.80, 314,983.20 and 121,415.30 is: 182,122.95
Step by Step Solution
- Step 1: Write the proportion equation
209,988.80 : 314,983.20 = 121,415.30 : x - Step 2: Convert to fraction form
209,988.80/314,983.20 = 121,415.30/x - Step 3: Cross multiply
209,988.80x = 314,983.20 × 121,415.30 - Step 4: Simplify right side
209,988.80x = 38,243,779,722.96 - Step 5: Solve for x
x = 38,243,779,722.96/209,988.80 - Step 6: Final answer
x = 182,122.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.