Finding the Fourth Proportional to 79,720.84, 109,894.48 and 65,549.08
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Solution
The fourth proportional to 79,720.84, 109,894.48 and 65,549.08 is: 90,358.83
Step by Step Solution
- Step 1: Write the proportion equation
79,720.84 : 109,894.48 = 65,549.08 : x - Step 2: Convert to fraction form
79,720.84/109,894.48 = 65,549.08/x - Step 3: Cross multiply
79,720.84x = 109,894.48 × 65,549.08 - Step 4: Simplify right side
79,720.84x = 7,203,482,061.08 - Step 5: Solve for x
x = 7,203,482,061.08/79,720.84 - Step 6: Final answer
x = 90,358.83
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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.