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Finding the Fourth Proportional to 190.69, 263.16 and 125.28

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Solution

The fourth proportional to 190.69, 263.16 and 125.28 is: 172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.69 : 263.16 = 125.28 : x
  2. Step 2: Convert to fraction form
    190.69/263.16 = 125.28/x
  3. Step 3: Cross multiply
    190.69x = 263.16 × 125.28
  4. Step 4: Simplify right side
    190.69x = 32,968.68
  5. Step 5: Solve for x
    x = 32,968.68/190.69
  6. Step 6: Final answer
    x = 172.89

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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.