Finding the Fourth Proportional to 139,718.72, 192,811.86 and 76,056.99
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Solution
The fourth proportional to 139,718.72, 192,811.86 and 76,056.99 is: 104,958.66
Step by Step Solution
- Step 1: Write the proportion equation
139,718.72 : 192,811.86 = 76,056.99 : x - Step 2: Convert to fraction form
139,718.72/192,811.86 = 76,056.99/x - Step 3: Cross multiply
139,718.72x = 192,811.86 × 76,056.99 - Step 4: Simplify right side
139,718.72x = 14,664,690,145.73 - Step 5: Solve for x
x = 14,664,690,145.73/139,718.72 - Step 6: Final answer
x = 104,958.66
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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.