Finding the Fourth Proportional to 86,638.01, 129,989.21 and 52,973.09
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Solution
The fourth proportional to 86,638.01, 129,989.21 and 52,973.09 is: 79,479.32
Step by Step Solution
- Step 1: Write the proportion equation
86,638.01 : 129,989.21 = 52,973.09 : x - Step 2: Convert to fraction form
86,638.01/129,989.21 = 52,973.09/x - Step 3: Cross multiply
86,638.01x = 129,989.21 × 52,973.09 - Step 4: Simplify right side
86,638.01x = 6,885,929,693.01 - Step 5: Solve for x
x = 6,885,929,693.01/86,638.01 - Step 6: Final answer
x = 79,479.32
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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.