Finding the Fourth Proportional to 78,681.97, 108,581.13 and 42,871.99
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Solution
The fourth proportional to 78,681.97, 108,581.13 and 42,871.99 is: 59,163.35
Step by Step Solution
- Step 1: Write the proportion equation
78,681.97 : 108,581.13 = 42,871.99 : x - Step 2: Convert to fraction form
78,681.97/108,581.13 = 42,871.99/x - Step 3: Cross multiply
78,681.97x = 108,581.13 × 42,871.99 - Step 4: Simplify right side
78,681.97x = 4,655,088,848.10 - Step 5: Solve for x
x = 4,655,088,848.10/78,681.97 - Step 6: Final answer
x = 59,163.35
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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.