Finding the Fourth Proportional to 128,430.64, 192,726.15 and 92,410.75
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Solution
The fourth proportional to 128,430.64, 192,726.15 and 92,410.75 is: 138,673.82
Step by Step Solution
- Step 1: Write the proportion equation
128,430.64 : 192,726.15 = 92,410.75 : x - Step 2: Convert to fraction form
128,430.64/192,726.15 = 92,410.75/x - Step 3: Cross multiply
128,430.64x = 192,726.15 × 92,410.75 - Step 4: Simplify right side
128,430.64x = 17,809,968,066.11 - Step 5: Solve for x
x = 17,809,968,066.11/128,430.64 - Step 6: Final answer
x = 138,673.82
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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.