Finding the Fourth Proportional to 100,688.24, 138,946.96 and 55,366.31
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Solution
The fourth proportional to 100,688.24, 138,946.96 and 55,366.31 is: 76,403.96
Step by Step Solution
- Step 1: Write the proportion equation
100,688.24 : 138,946.96 = 55,366.31 : x - Step 2: Convert to fraction form
100,688.24/138,946.96 = 55,366.31/x - Step 3: Cross multiply
100,688.24x = 138,946.96 × 55,366.31 - Step 4: Simplify right side
100,688.24x = 7,692,980,460.92 - Step 5: Solve for x
x = 7,692,980,460.92/100,688.24 - Step 6: Final answer
x = 76,403.96
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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.