Finding the Fourth Proportional to 100,705.10, 138,970.26 and 55,383.08
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Solution
The fourth proportional to 100,705.10, 138,970.26 and 55,383.08 is: 76,427.12
Step by Step Solution
- Step 1: Write the proportion equation
100,705.10 : 138,970.26 = 55,383.08 : x - Step 2: Convert to fraction form
100,705.10/138,970.26 = 55,383.08/x - Step 3: Cross multiply
100,705.10x = 138,970.26 × 55,383.08 - Step 4: Simplify right side
100,705.10x = 7,696,600,176.58 - Step 5: Solve for x
x = 7,696,600,176.58/100,705.10 - Step 6: Final answer
x = 76,427.12
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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.