Finding the Fourth Proportional to 139,700.74, 192,781.32 and 79,270.12
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Solution
The fourth proportional to 139,700.74, 192,781.32 and 79,270.12 is: 109,389.53
Step by Step Solution
- Step 1: Write the proportion equation
139,700.74 : 192,781.32 = 79,270.12 : x - Step 2: Convert to fraction form
139,700.74/192,781.32 = 79,270.12/x - Step 3: Cross multiply
139,700.74x = 192,781.32 × 79,270.12 - Step 4: Simplify right side
139,700.74x = 15,281,798,370.16 - Step 5: Solve for x
x = 15,281,798,370.16/139,700.74 - Step 6: Final answer
x = 109,389.53
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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.