Finding the Fourth Proportional to 157,692.20, 217,616.36 and 86,072.80
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Solution
The fourth proportional to 157,692.20, 217,616.36 and 86,072.80 is: 118,781.08
Step by Step Solution
- Step 1: Write the proportion equation
157,692.20 : 217,616.36 = 86,072.80 : x - Step 2: Convert to fraction form
157,692.20/217,616.36 = 86,072.80/x - Step 3: Cross multiply
157,692.20x = 217,616.36 × 86,072.80 - Step 4: Simplify right side
157,692.20x = 18,730,849,431.01 - Step 5: Solve for x
x = 18,730,849,431.01/157,692.20 - Step 6: Final answer
x = 118,781.08
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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.