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Finding the Fourth Proportional to 127.98, 190.89 and 125.55

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Solution

The fourth proportional to 127.98, 190.89 and 125.55 is: 187.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.98 : 190.89 = 125.55 : x
  2. Step 2: Convert to fraction form
    127.98/190.89 = 125.55/x
  3. Step 3: Cross multiply
    127.98x = 190.89 × 125.55
  4. Step 4: Simplify right side
    127.98x = 23,966.24
  5. Step 5: Solve for x
    x = 23,966.24/127.98
  6. Step 6: Final answer
    x = 187.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.