Finding the Fourth Proportional to 139,947.04, 193,121.12 and 76,283.44
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Solution
The fourth proportional to 139,947.04, 193,121.12 and 76,283.44 is: 105,267.99
Step by Step Solution
- Step 1: Write the proportion equation
139,947.04 : 193,121.12 = 76,283.44 : x - Step 2: Convert to fraction form
139,947.04/193,121.12 = 76,283.44/x - Step 3: Cross multiply
139,947.04x = 193,121.12 × 76,283.44 - Step 4: Simplify right side
139,947.04x = 14,731,943,370.25 - Step 5: Solve for x
x = 14,731,943,370.25/139,947.04 - Step 6: Final answer
x = 105,267.99
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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.