Finding the Fourth Proportional to 145,987.80, 201,463.08 and 78,919.80
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Solution
The fourth proportional to 145,987.80, 201,463.08 and 78,919.80 is: 108,909.28
Step by Step Solution
- Step 1: Write the proportion equation
145,987.80 : 201,463.08 = 78,919.80 : x - Step 2: Convert to fraction form
145,987.80/201,463.08 = 78,919.80/x - Step 3: Cross multiply
145,987.80x = 201,463.08 × 78,919.80 - Step 4: Simplify right side
145,987.80x = 15,899,425,980.98 - Step 5: Solve for x
x = 15,899,425,980.98/145,987.80 - Step 6: Final answer
x = 108,909.28
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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.