Finding the Fourth Proportional to 71,297.18, 107,139.64 and 38,040.74
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Solution
The fourth proportional to 71,297.18, 107,139.64 and 38,040.74 is: 57,164.55
Step by Step Solution
- Step 1: Write the proportion equation
71,297.18 : 107,139.64 = 38,040.74 : x - Step 2: Convert to fraction form
71,297.18/107,139.64 = 38,040.74/x - Step 3: Cross multiply
71,297.18x = 107,139.64 × 38,040.74 - Step 4: Simplify right side
71,297.18x = 4,075,671,188.93 - Step 5: Solve for x
x = 4,075,671,188.93/71,297.18 - Step 6: Final answer
x = 57,164.55
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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.