Finding the Fourth Proportional to 76,387.05, 105,407.11 and 42,394.99
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Solution
The fourth proportional to 76,387.05, 105,407.11 and 42,394.99 is: 58,501.19
Step by Step Solution
- Step 1: Write the proportion equation
76,387.05 : 105,407.11 = 42,394.99 : x - Step 2: Convert to fraction form
76,387.05/105,407.11 = 42,394.99/x - Step 3: Cross multiply
76,387.05x = 105,407.11 × 42,394.99 - Step 4: Simplify right side
76,387.05x = 4,468,733,162.40 - Step 5: Solve for x
x = 4,468,733,162.40/76,387.05 - Step 6: Final answer
x = 58,501.19
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1.5x scale
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.