Finding the Fourth Proportional to 128,742.58, 193,167.21 and 69,508.63
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Solution
The fourth proportional to 128,742.58, 193,167.21 and 69,508.63 is: 104,291.74
Step by Step Solution
- Step 1: Write the proportion equation
128,742.58 : 193,167.21 = 69,508.63 : x - Step 2: Convert to fraction form
128,742.58/193,167.21 = 69,508.63/x - Step 3: Cross multiply
128,742.58x = 193,167.21 × 69,508.63 - Step 4: Simplify right side
128,742.58x = 13,426,787,162.19 - Step 5: Solve for x
x = 13,426,787,162.19/128,742.58 - Step 6: Final answer
x = 104,291.74
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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.