Finding the Fourth Proportional to 139,938.06, 193,114.56 and 76,275.84
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Solution
The fourth proportional to 139,938.06, 193,114.56 and 76,275.84 is: 105,260.68
Step by Step Solution
- Step 1: Write the proportion equation
139,938.06 : 193,114.56 = 76,275.84 : x - Step 2: Convert to fraction form
139,938.06/193,114.56 = 76,275.84/x - Step 3: Cross multiply
139,938.06x = 193,114.56 × 76,275.84 - Step 4: Simplify right side
139,938.06x = 14,729,975,280.23 - Step 5: Solve for x
x = 14,729,975,280.23/139,938.06 - Step 6: Final answer
x = 105,260.68
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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.