Finding the Fourth Proportional to 85,590.21, 128,415.71 and 38,201.00
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Solution
The fourth proportional to 85,590.21, 128,415.71 and 38,201.00 is: 57,315.06
Step by Step Solution
- Step 1: Write the proportion equation
85,590.21 : 128,415.71 = 38,201.00 : x - Step 2: Convert to fraction form
85,590.21/128,415.71 = 38,201.00/x - Step 3: Cross multiply
85,590.21x = 128,415.71 × 38,201.00 - Step 4: Simplify right side
85,590.21x = 4,905,607,991.13 - Step 5: Solve for x
x = 4,905,607,991.13/85,590.21 - Step 6: Final answer
x = 57,315.06
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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.