Finding the Fourth Proportional to 78,577.66, 108,439.47 and 42,769.99
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Solution
The fourth proportional to 78,577.66, 108,439.47 and 42,769.99 is: 59,023.84
Step by Step Solution
- Step 1: Write the proportion equation
78,577.66 : 108,439.47 = 42,769.99 : x - Step 2: Convert to fraction form
78,577.66/108,439.47 = 42,769.99/x - Step 3: Cross multiply
78,577.66x = 108,439.47 × 42,769.99 - Step 4: Simplify right side
78,577.66x = 4,637,955,047.51 - Step 5: Solve for x
x = 4,637,955,047.51/78,577.66 - Step 6: Final answer
x = 59,023.84
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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.