Finding the Fourth Proportional to 128,905.68, 193,312.19 and 44,643.15
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Solution
The fourth proportional to 128,905.68, 193,312.19 and 44,643.15 is: 66,948.68
Step by Step Solution
- Step 1: Write the proportion equation
128,905.68 : 193,312.19 = 44,643.15 : x - Step 2: Convert to fraction form
128,905.68/193,312.19 = 44,643.15/x - Step 3: Cross multiply
128,905.68x = 193,312.19 × 44,643.15 - Step 4: Simplify right side
128,905.68x = 8,630,064,611.72 - Step 5: Solve for x
x = 8,630,064,611.72/128,905.68 - Step 6: Final answer
x = 66,948.68
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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.