Finding the Fourth Proportional to 92,485.80, 138,728.70 and 79,363.80
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Solution
The fourth proportional to 92,485.80, 138,728.70 and 79,363.80 is: 119,045.70
Step by Step Solution
- Step 1: Write the proportion equation
92,485.80 : 138,728.70 = 79,363.80 : x - Step 2: Convert to fraction form
92,485.80/138,728.70 = 79,363.80/x - Step 3: Cross multiply
92,485.80x = 138,728.70 × 79,363.80 - Step 4: Simplify right side
92,485.80x = 11,010,036,801.06 - Step 5: Solve for x
x = 11,010,036,801.06/92,485.80 - Step 6: Final answer
x = 119,045.70
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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.