Finding the Fourth Proportional to 124,157.69, 171,285.35 and 78,135.80
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Solution
The fourth proportional to 124,157.69, 171,285.35 and 78,135.80 is: 107,794.52
Step by Step Solution
- Step 1: Write the proportion equation
124,157.69 : 171,285.35 = 78,135.80 : x - Step 2: Convert to fraction form
124,157.69/171,285.35 = 78,135.80/x - Step 3: Cross multiply
124,157.69x = 171,285.35 × 78,135.80 - Step 4: Simplify right side
124,157.69x = 13,383,518,474.08 - Step 5: Solve for x
x = 13,383,518,474.08/124,157.69 - Step 6: Final answer
x = 107,794.52
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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.