Finding the Fourth Proportional to 139,683.74, 192,763.56 and 76,021.99
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Solution
The fourth proportional to 139,683.74, 192,763.56 and 76,021.99 is: 104,910.34
Step by Step Solution
- Step 1: Write the proportion equation
139,683.74 : 192,763.56 = 76,021.99 : x - Step 2: Convert to fraction form
139,683.74/192,763.56 = 76,021.99/x - Step 3: Cross multiply
139,683.74x = 192,763.56 × 76,021.99 - Step 4: Simplify right side
139,683.74x = 14,654,268,086.76 - Step 5: Solve for x
x = 14,654,268,086.76/139,683.74 - Step 6: Final answer
x = 104,910.34
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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.