Finding the Fourth Proportional to 139,840.12, 192,979.50 and 76,177.84
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Solution
The fourth proportional to 139,840.12, 192,979.50 and 76,177.84 is: 105,125.49
Step by Step Solution
- Step 1: Write the proportion equation
139,840.12 : 192,979.50 = 76,177.84 : x - Step 2: Convert to fraction form
139,840.12/192,979.50 = 76,177.84/x - Step 3: Cross multiply
139,840.12x = 192,979.50 × 76,177.84 - Step 4: Simplify right side
139,840.12x = 14,700,761,474.28 - Step 5: Solve for x
x = 14,700,761,474.28/139,840.12 - Step 6: Final answer
x = 105,125.49
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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.