Finding the Fourth Proportional to 139,952.99, 193,128.14 and 79,515.65
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Solution
The fourth proportional to 139,952.99, 193,128.14 and 79,515.65 is: 109,727.63
Step by Step Solution
- Step 1: Write the proportion equation
139,952.99 : 193,128.14 = 79,515.65 : x - Step 2: Convert to fraction form
139,952.99/193,128.14 = 79,515.65/x - Step 3: Cross multiply
139,952.99x = 193,128.14 × 79,515.65 - Step 4: Simplify right side
139,952.99x = 15,356,708,818.54 - Step 5: Solve for x
x = 15,356,708,818.54/139,952.99 - Step 6: Final answer
x = 109,727.63
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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.