Finding the Fourth Proportional to 85,348.68, 128,009.52 and 29,188.68
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Solution
The fourth proportional to 85,348.68, 128,009.52 and 29,188.68 is: 43,778.40
Step by Step Solution
- Step 1: Write the proportion equation
85,348.68 : 128,009.52 = 29,188.68 : x - Step 2: Convert to fraction form
85,348.68/128,009.52 = 29,188.68/x - Step 3: Cross multiply
85,348.68x = 128,009.52 × 29,188.68 - Step 4: Simplify right side
85,348.68x = 3,736,428,916.23 - Step 5: Solve for x
x = 3,736,428,916.23/85,348.68 - Step 6: Final answer
x = 43,778.40
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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.