Finding the Fourth Proportional to 77,139.99, 115,390.08 and 72,416.07
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Solution
The fourth proportional to 77,139.99, 115,390.08 and 72,416.07 is: 108,323.79
Step by Step Solution
- Step 1: Write the proportion equation
77,139.99 : 115,390.08 = 72,416.07 : x - Step 2: Convert to fraction form
77,139.99/115,390.08 = 72,416.07/x - Step 3: Cross multiply
77,139.99x = 115,390.08 × 72,416.07 - Step 4: Simplify right side
77,139.99x = 8,356,096,110.59 - Step 5: Solve for x
x = 8,356,096,110.59/77,139.99 - Step 6: Final answer
x = 108,323.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.