Finding the Fourth Proportional to 115,962.87, 160,106.73 and 72,421.75
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Solution
The fourth proportional to 115,962.87, 160,106.73 and 72,421.75 is: 99,990.71
Step by Step Solution
- Step 1: Write the proportion equation
115,962.87 : 160,106.73 = 72,421.75 : x - Step 2: Convert to fraction form
115,962.87/160,106.73 = 72,421.75/x - Step 3: Cross multiply
115,962.87x = 160,106.73 × 72,421.75 - Step 4: Simplify right side
115,962.87x = 11,595,209,573.38 - Step 5: Solve for x
x = 11,595,209,573.38/115,962.87 - Step 6: Final answer
x = 99,990.71
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1.5x scale
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.