Finding the Fourth Proportional to 85,622.13, 128,430.54 and 40,675.84
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Solution
The fourth proportional to 85,622.13, 128,430.54 and 40,675.84 is: 61,012.50
Step by Step Solution
- Step 1: Write the proportion equation
85,622.13 : 128,430.54 = 40,675.84 : x - Step 2: Convert to fraction form
85,622.13/128,430.54 = 40,675.84/x - Step 3: Cross multiply
85,622.13x = 128,430.54 × 40,675.84 - Step 4: Simplify right side
85,622.13x = 5,224,020,096.15 - Step 5: Solve for x
x = 5,224,020,096.15/85,622.13 - Step 6: Final answer
x = 61,012.50
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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.