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Finding the Fourth Proportional to 126.54, 190.00 and 75.28

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Solution

The fourth proportional to 126.54, 190.00 and 75.28 is: 113.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.54 : 190.00 = 75.28 : x
  2. Step 2: Convert to fraction form
    126.54/190.00 = 75.28/x
  3. Step 3: Cross multiply
    126.54x = 190.00 × 75.28
  4. Step 4: Simplify right side
    126.54x = 14,302.75
  5. Step 5: Solve for x
    x = 14,302.75/126.54
  6. Step 6: Final answer
    x = 113.03

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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.