Finding the Fourth Proportional to 78,727.95, 108,644.63 and 42,917.99
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Solution
The fourth proportional to 78,727.95, 108,644.63 and 42,917.99 is: 59,226.85
Step by Step Solution
- Step 1: Write the proportion equation
78,727.95 : 108,644.63 = 42,917.99 : x - Step 2: Convert to fraction form
78,727.95/108,644.63 = 42,917.99/x - Step 3: Cross multiply
78,727.95x = 108,644.63 × 42,917.99 - Step 4: Simplify right side
78,727.95x = 4,662,808,386.08 - Step 5: Solve for x
x = 4,662,808,386.08/78,727.95 - Step 6: Final answer
x = 59,226.85
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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.