Finding the Fourth Proportional to 78,137.28, 107,829.02 and 42,327.99
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Solution
The fourth proportional to 78,137.28, 107,829.02 and 42,327.99 is: 58,412.39
Step by Step Solution
- Step 1: Write the proportion equation
78,137.28 : 107,829.02 = 42,327.99 : x - Step 2: Convert to fraction form
78,137.28/107,829.02 = 42,327.99/x - Step 3: Cross multiply
78,137.28x = 107,829.02 × 42,327.99 - Step 4: Simplify right side
78,137.28x = 4,564,185,468.63 - Step 5: Solve for x
x = 4,564,185,468.63/78,137.28 - Step 6: Final answer
x = 58,412.39
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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.