Finding the Fourth Proportional to 128,461.20, 177,312.12 and 74,756.64
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Solution
The fourth proportional to 128,461.20, 177,312.12 and 74,756.64 is: 103,184.92
Step by Step Solution
- Step 1: Write the proportion equation
128,461.20 : 177,312.12 = 74,756.64 : x - Step 2: Convert to fraction form
128,461.20/177,312.12 = 74,756.64/x - Step 3: Cross multiply
128,461.20x = 177,312.12 × 74,756.64 - Step 4: Simplify right side
128,461.20x = 13,255,258,322.48 - Step 5: Solve for x
x = 13,255,258,322.48/128,461.20 - Step 6: Final answer
x = 103,184.92
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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.