Finding the Fourth Proportional to 100,039.79, 138,059.34 and 57,611.99
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Solution
The fourth proportional to 100,039.79, 138,059.34 and 57,611.99 is: 79,507.10
Step by Step Solution
- Step 1: Write the proportion equation
100,039.79 : 138,059.34 = 57,611.99 : x - Step 2: Convert to fraction form
100,039.79/138,059.34 = 57,611.99/x - Step 3: Cross multiply
100,039.79x = 138,059.34 × 57,611.99 - Step 4: Simplify right side
100,039.79x = 7,953,873,444.59 - Step 5: Solve for x
x = 7,953,873,444.59/100,039.79 - Step 6: Final answer
x = 79,507.10
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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.