Finding the Fourth Proportional to 135,407.99, 186,864.99 and 74,978.51
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Solution
The fourth proportional to 135,407.99, 186,864.99 and 74,978.51 is: 103,471.43
Step by Step Solution
- Step 1: Write the proportion equation
135,407.99 : 186,864.99 = 74,978.51 : x - Step 2: Convert to fraction form
135,407.99/186,864.99 = 74,978.51/x - Step 3: Cross multiply
135,407.99x = 186,864.99 × 74,978.51 - Step 4: Simplify right side
135,407.99x = 14,010,857,587.04 - Step 5: Solve for x
x = 14,010,857,587.04/135,407.99 - Step 6: Final answer
x = 103,471.43
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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.