Finding the Fourth Proportional to 128,442.08, 177,246.96 and 71,855.48
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Solution
The fourth proportional to 128,442.08, 177,246.96 and 71,855.48 is: 99,158.82
Step by Step Solution
- Step 1: Write the proportion equation
128,442.08 : 177,246.96 = 71,855.48 : x - Step 2: Convert to fraction form
128,442.08/177,246.96 = 71,855.48/x - Step 3: Cross multiply
128,442.08x = 177,246.96 × 71,855.48 - Step 4: Simplify right side
128,442.08x = 12,736,165,389.34 - Step 5: Solve for x
x = 12,736,165,389.34/128,442.08 - Step 6: Final answer
x = 99,158.82
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.