Finding the Fourth Proportional to 145,977.70, 201,449.28 and 78,909.70
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Solution
The fourth proportional to 145,977.70, 201,449.28 and 78,909.70 is: 108,895.42
Step by Step Solution
- Step 1: Write the proportion equation
145,977.70 : 201,449.28 = 78,909.70 : x - Step 2: Convert to fraction form
145,977.70/201,449.28 = 78,909.70/x - Step 3: Cross multiply
145,977.70x = 201,449.28 × 78,909.70 - Step 4: Simplify right side
145,977.70x = 15,896,302,250.02 - Step 5: Solve for x
x = 15,896,302,250.02/145,977.70 - Step 6: Final answer
x = 108,895.42
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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.