Finding the Fourth Proportional to 76,815.36, 115,638.02 and 69,090.98
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Solution
The fourth proportional to 76,815.36, 115,638.02 and 69,090.98 is: 104,009.72
Step by Step Solution
- Step 1: Write the proportion equation
76,815.36 : 115,638.02 = 69,090.98 : x - Step 2: Convert to fraction form
76,815.36/115,638.02 = 69,090.98/x - Step 3: Cross multiply
76,815.36x = 115,638.02 × 69,090.98 - Step 4: Simplify right side
76,815.36x = 7,989,544,127.06 - Step 5: Solve for x
x = 7,989,544,127.06/76,815.36 - Step 6: Final answer
x = 104,009.72
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.