Finding the Fourth Proportional to 136,038.54, 187,785.50 and 90,699.99
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Solution
The fourth proportional to 136,038.54, 187,785.50 and 90,699.99 is: 125,200.87
Step by Step Solution
- Step 1: Write the proportion equation
136,038.54 : 187,785.50 = 90,699.99 : x - Step 2: Convert to fraction form
136,038.54/187,785.50 = 90,699.99/x - Step 3: Cross multiply
136,038.54x = 187,785.50 × 90,699.99 - Step 4: Simplify right side
136,038.54x = 17,032,142,972.15 - Step 5: Solve for x
x = 17,032,142,972.15/136,038.54 - Step 6: Final answer
x = 125,200.87
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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.