Finding the Fourth Proportional to 128,774.08, 177,718.08 and 81,068.32
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Solution
The fourth proportional to 128,774.08, 177,718.08 and 81,068.32 is: 111,880.48
Step by Step Solution
- Step 1: Write the proportion equation
128,774.08 : 177,718.08 = 81,068.32 : x - Step 2: Convert to fraction form
128,774.08/177,718.08 = 81,068.32/x - Step 3: Cross multiply
128,774.08x = 177,718.08 × 81,068.32 - Step 4: Simplify right side
128,774.08x = 14,407,306,179.23 - Step 5: Solve for x
x = 14,407,306,179.23/128,774.08 - Step 6: Final answer
x = 111,880.48
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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.