Finding the Fourth Proportional to 128,314.32, 192,459.09 and 39,543.99
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Solution
The fourth proportional to 128,314.32, 192,459.09 and 39,543.99 is: 59,312.17
Step by Step Solution
- Step 1: Write the proportion equation
128,314.32 : 192,459.09 = 39,543.99 : x - Step 2: Convert to fraction form
128,314.32/192,459.09 = 39,543.99/x - Step 3: Cross multiply
128,314.32x = 192,459.09 × 39,543.99 - Step 4: Simplify right side
128,314.32x = 7,610,600,330.37 - Step 5: Solve for x
x = 7,610,600,330.37/128,314.32 - Step 6: Final answer
x = 59,312.17
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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.