Finding the Fourth Proportional to 85,905.92, 128,828.01 and 29,730.79
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Solution
The fourth proportional to 85,905.92, 128,828.01 and 29,730.79 is: 44,585.50
Step by Step Solution
- Step 1: Write the proportion equation
85,905.92 : 128,828.01 = 29,730.79 : x - Step 2: Convert to fraction form
85,905.92/128,828.01 = 29,730.79/x - Step 3: Cross multiply
85,905.92x = 128,828.01 × 29,730.79 - Step 4: Simplify right side
85,905.92x = 3,830,158,511.43 - Step 5: Solve for x
x = 3,830,158,511.43/85,905.92 - Step 6: Final answer
x = 44,585.50
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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.