Finding the Fourth Proportional to 138,460.52, 207,705.36 and 68,272.40
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Solution
The fourth proportional to 138,460.52, 207,705.36 and 68,272.40 is: 102,415.79
Step by Step Solution
- Step 1: Write the proportion equation
138,460.52 : 207,705.36 = 68,272.40 : x - Step 2: Convert to fraction form
138,460.52/207,705.36 = 68,272.40/x - Step 3: Cross multiply
138,460.52x = 207,705.36 × 68,272.40 - Step 4: Simplify right side
138,460.52x = 14,180,543,420.06 - Step 5: Solve for x
x = 14,180,543,420.06/138,460.52 - Step 6: Final answer
x = 102,415.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.