Finding the Fourth Proportional to 75,139.50, 103,691.77 and 40,684.06
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Solution
The fourth proportional to 75,139.50, 103,691.77 and 40,684.06 is: 56,143.60
Step by Step Solution
- Step 1: Write the proportion equation
75,139.50 : 103,691.77 = 40,684.06 : x - Step 2: Convert to fraction form
75,139.50/103,691.77 = 40,684.06/x - Step 3: Cross multiply
75,139.50x = 103,691.77 × 40,684.06 - Step 4: Simplify right side
75,139.50x = 4,218,602,248.00 - Step 5: Solve for x
x = 4,218,602,248.00/75,139.50 - Step 6: Final answer
x = 56,143.60
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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.