Finding the Fourth Proportional to 85,602.18, 128,466.34 and 40,623.68
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Solution
The fourth proportional to 85,602.18, 128,466.34 and 40,623.68 is: 60,965.45
Step by Step Solution
- Step 1: Write the proportion equation
85,602.18 : 128,466.34 = 40,623.68 : x - Step 2: Convert to fraction form
85,602.18/128,466.34 = 40,623.68/x - Step 3: Cross multiply
85,602.18x = 128,466.34 × 40,623.68 - Step 4: Simplify right side
85,602.18x = 5,218,775,486.93 - Step 5: Solve for x
x = 5,218,775,486.93/85,602.18 - Step 6: Final answer
x = 60,965.45
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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.