Finding the Fourth Proportional to 85,922.93, 128,978.64 and 68,267.05
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Solution
The fourth proportional to 85,922.93, 128,978.64 and 68,267.05 is: 102,475.45
Step by Step Solution
- Step 1: Write the proportion equation
85,922.93 : 128,978.64 = 68,267.05 : x - Step 2: Convert to fraction form
85,922.93/128,978.64 = 68,267.05/x - Step 3: Cross multiply
85,922.93x = 128,978.64 × 68,267.05 - Step 4: Simplify right side
85,922.93x = 8,804,990,943.37 - Step 5: Solve for x
x = 8,804,990,943.37/85,922.93 - Step 6: Final answer
x = 102,475.45
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1.5x scale
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.