Finding the Fourth Proportional to 138,690.84, 207,712.26 and 68,343.96
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Solution
The fourth proportional to 138,690.84, 207,712.26 and 68,343.96 is: 102,356.28
Step by Step Solution
- Step 1: Write the proportion equation
138,690.84 : 207,712.26 = 68,343.96 : x - Step 2: Convert to fraction form
138,690.84/207,712.26 = 68,343.96/x - Step 3: Cross multiply
138,690.84x = 207,712.26 × 68,343.96 - Step 4: Simplify right side
138,690.84x = 14,195,878,388.95 - Step 5: Solve for x
x = 14,195,878,388.95/138,690.84 - Step 6: Final answer
x = 102,356.28
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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.