Finding the Fourth Proportional to 85,235.31, 128,133.26 and 79,069.76
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Solution
The fourth proportional to 85,235.31, 128,133.26 and 79,069.76 is: 118,864.65
Step by Step Solution
- Step 1: Write the proportion equation
85,235.31 : 128,133.26 = 79,069.76 : x - Step 2: Convert to fraction form
85,235.31/128,133.26 = 79,069.76/x - Step 3: Cross multiply
85,235.31x = 128,133.26 × 79,069.76 - Step 4: Simplify right side
85,235.31x = 10,131,465,400.54 - Step 5: Solve for x
x = 10,131,465,400.54/85,235.31 - Step 6: Final answer
x = 118,864.65
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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.